When patrolling the North Atlantic and Arctic Ocean from 1960s to 1980s, the russian sailors in submarines could hear strage sounds at times. In that the sounds resembled frog croaks, they named the sounds "quackers". They are sounded like there are something moving quickly with great agility, but the sonar in the submarines could not detect anything moving like this. Thus there are several speculations about the origins of the sounds. From the oecral whales which wanted to attracted mates with the sounds to giant squid which seemed to be curious about the submarines, even the submarines from other countires. However, the lecturer cast doubts on these theories.
Firstly, with different sea levels from submarines' when moving, the orca whales can not be the sound makers. The orca whales usually live in the surface water, while the submarines often moved in the deep sea. Thus the sounds heard by russian soldiers can not be the orca whales. Also, the submarines didn't detect them when the soldiers heard the sounds.
Secondly, the giant squids still live in that area while there is no quakers heard after the 1980s. In the passage, it indicates that as giant invertibrates living in the sea, the giant squids can not be detected by sonar because of their soft bodies, so the sounds may be from the squids which were likely to be curious about the submarines. While the sounds were heard froom 1960s to 1980s, then they stoped. Now the squids still live there thus this phnomenon could not be explianed by the curious squids.
Thirdly, there are no invisible submarines with silent engines being built. As the submarines can not have such speed and agility, the engines would make great sounds, while the soldiers did not find any submarines, so it was not other countires' submarines.
Grammar and spelling errors:
Line 1, column 382, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[1]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: Thus,
...d not detect anything moving like this. Thus there are several speculations about th...
^^^^
Line 3, column 211, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[1]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: Thus,
...submarines often moved in the deep sea. Thus the sounds heard by russian soldiers ca...
^^^^
Line 3, column 302, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: didn't
...e the orca whales. Also, the submarines didnt detect them when the soldiers heard the...
^^^^^
Line 5, column 58, Rule ID: THERE_S_MANY[4]
Message: Did you mean 'there are no quakers'?
Suggestion: there are no quakers
...nt squids still live in that area while there is no quakers heard after the 1980s. In the passage, ...
^^^^^^^^^^^^^^^^^^^
Transition Words or Phrases used:
also, but, first, firstly, however, if, may, second, secondly, so, still, then, third, thirdly, thus, while
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 16.0 10.4613686534 153% => OK
Auxiliary verbs: 9.0 5.04856512141 178% => OK
Conjunction : 3.0 7.30242825607 41% => More conjunction wanted.
Relative clauses : 9.0 12.0772626932 75% => More relative clauses wanted.
Pronoun: 13.0 22.412803532 58% => OK
Preposition: 36.0 30.3222958057 119% => OK
Nominalization: 0.0 5.01324503311 0% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1512.0 1373.03311258 110% => OK
No of words: 302.0 270.72406181 112% => OK
Chars per words: 5.00662251656 5.08290768461 98% => OK
Fourth root words length: 4.1687104957 4.04702891845 103% => OK
Word Length SD: 2.45871128292 2.5805825403 95% => OK
Unique words: 150.0 145.348785872 103% => OK
Unique words percentage: 0.496688741722 0.540411800872 92% => More unique words wanted or less content wanted.
syllable_count: 436.5 419.366225166 104% => OK
avg_syllables_per_word: 1.4 1.55342163355 90% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 3.0 3.25607064018 92% => OK
Article: 8.0 8.23620309051 97% => OK
Subordination: 5.0 1.25165562914 399% => Less adverbial clause wanted.
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 4.0 2.5761589404 155% => OK
Performance on sentences:
How many sentences: 16.0 13.0662251656 122% => OK
Sentence length: 18.0 21.2450331126 85% => The Avg. Sentence Length is relatively short.
Sentence length SD: 51.0525158538 49.2860985944 104% => OK
Chars per sentence: 94.5 110.228320801 86% => OK
Words per sentence: 18.875 21.698381199 87% => OK
Discourse Markers: 6.6875 7.06452816374 95% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 4.0 4.19205298013 95% => OK
Sentences with positive sentiment : 5.0 4.33554083885 115% => OK
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 8.0 4.27373068433 187% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.19243878046 0.272083759551 71% => OK
Sentence topic coherence: 0.0717767073024 0.0996497079465 72% => OK
Sentence topic coherence SD: 0.0772991964196 0.0662205650399 117% => OK
Paragraph topic coherence: 0.11979860237 0.162205337803 74% => OK
Paragraph topic coherence SD: 0.0658322695044 0.0443174109184 149% => OK
Essay readability:
automated_readability_index: 11.6 13.3589403974 87% => Automated_readability_index is low.
flesch_reading_ease: 70.13 53.8541721854 130% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 7.9 11.0289183223 72% => OK
coleman_liau_index: 11.78 12.2367328918 96% => OK
dale_chall_readability_score: 7.51 8.42419426049 89% => OK
difficult_words: 57.0 63.6247240618 90% => OK
linsear_write_formula: 11.5 10.7273730684 107% => OK
gunning_fog: 9.2 10.498013245 88% => OK
text_standard: 12.0 11.2008830022 107% => OK
What are above readability scores?
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Rates: 73.3333333333 out of 100
Scores by essay e-grader: 22.0 Out of 30
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.