The passage puts forward three advantages of hydrogen-based engine to demonstrate that hydrogen-based engine will replace the internal-combustion engine. However, the lecturer says that hydrogen is not the solution to the problems mentioned in the passage.
First, hydrogen does rely on many renewable resources, but it isn' t easily available. Because it' s a practical pure liquid that is difficult to get and store. It needs to be stored at -253 ¡æ and requires elaborate cooling technology.
Second, hydrogen-based engine can' t solve the pollution problems mentioned in the passage, since pure hydrogen needs a purification process that needs energy produced by burning coal and oil.
Third, the passage says hydrogen-based engine cost less money and it is 2 times more efficient than the internal-combustion engine. But the lecturer says that it is expensive to manufacture a hydrogen-based engine because it needs platinum, which is rare and expensive and it can' t be replaced now.
Transition Words or Phrases used:
but, first, however, if, second, so, third
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 7.0 10.4613686534 67% => OK
Auxiliary verbs: 3.0 5.04856512141 59% => OK
Conjunction : 8.0 7.30242825607 110% => OK
Relative clauses : 6.0 12.0772626932 50% => More relative clauses wanted.
Pronoun: 12.0 22.412803532 54% => OK
Preposition: 12.0 30.3222958057 40% => More preposition wanted.
Nominalization: 5.0 5.01324503311 100% => OK
Performance on vocabulary words:
No of characters: 846.0 1373.03311258 62% => OK
No of words: 155.0 270.72406181 57% => More content wanted.
Chars per words: 5.45806451613 5.08290768461 107% => OK
Fourth root words length: 3.52844152537 4.04702891845 87% => OK
Word Length SD: 3.45055757156 2.5805825403 134% => OK
Unique words: 90.0 145.348785872 62% => More unique words wanted.
Unique words percentage: 0.58064516129 0.540411800872 107% => OK
syllable_count: 269.1 419.366225166 64% => OK
avg_syllables_per_word: 1.7 1.55342163355 109% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 1.0 3.25607064018 31% => OK
Article: 3.0 8.23620309051 36% => OK
Subordination: 2.0 1.25165562914 160% => OK
Conjunction: 2.0 1.51434878587 132% => OK
Preposition: 1.0 2.5761589404 39% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 8.0 13.0662251656 61% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 19.0 21.2450331126 89% => OK
Sentence length SD: 41.8820889522 49.2860985944 85% => OK
Chars per sentence: 105.75 110.228320801 96% => OK
Words per sentence: 19.375 21.698381199 89% => OK
Discourse Markers: 5.25 7.06452816374 74% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 4.0 4.33554083885 92% => OK
Sentences with negative sentiment : 2.0 4.45695364238 45% => More negative sentences wanted.
Sentences with neutral sentiment: 2.0 4.27373068433 47% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.209562800453 0.272083759551 77% => OK
Sentence topic coherence: 0.0879419275918 0.0996497079465 88% => OK
Sentence topic coherence SD: 0.0823326254853 0.0662205650399 124% => OK
Paragraph topic coherence: 0.132464814157 0.162205337803 82% => OK
Paragraph topic coherence SD: 0.0776363684357 0.0443174109184 175% => OK
Essay readability:
automated_readability_index: 14.0 13.3589403974 105% => OK
flesch_reading_ease: 43.73 53.8541721854 81% => OK
smog_index: 8.8 5.55761589404 158% => OK
flesch_kincaid_grade: 11.9 11.0289183223 108% => OK
coleman_liau_index: 14.39 12.2367328918 118% => OK
dale_chall_readability_score: 8.86 8.42419426049 105% => OK
difficult_words: 42.0 63.6247240618 66% => More difficult words wanted.
linsear_write_formula: 9.0 10.7273730684 84% => OK
gunning_fog: 9.6 10.498013245 91% => OK
text_standard: 9.0 11.2008830022 80% => OK
What are above readability scores?
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More content wanted.
Rates: 66.6666666667 out of 100
Scores by essay e-grader: 20.0 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.