原文定位:第1段第2句“For the better part of a century, most biologists have been reluctant to use those words, mindful of a principle of evolution that says ‘evolution cannot run backwards’.”(在一个世纪的大部分时间里,大多数生物学家不愿意用反向进化等这些词,他们铭记着一个进化原则即“进化...
When to use the passive voice Creative uses of the passive voice When to avoid the passive voice Passive voice FAQs What is the passive voice? The passive voice is one of the two types of grammatical voice. Voice, like tense, is a property that verbs have. Voice shows whether the subje...
Difference Between Well & Good | When to Use & Examples Quiz 2:58 Current Lesson Has vs. Have in a Sentence | Difference, Uses & Examples Has vs. Have in a Sentence | Difference, Uses & Examples Quiz 3:30 Next Lesson When to Use Begin, Began or Begun When to Use Begin,...
These two words sound alike but have different meanings. Learn the definitions of “past” and “passed,” with examples of how to use both correctly.
Time and Materials Contract vs. Fixed Price Contract As mentioned above, there are two main types of payment plans incontract administration. T&M contracts are used when plans are not precise enough to use a fixed-price contract (because there is no definite price for the work.) Instead, cont...
"Oh Harry," replied Mabel, "a similar object that protects against sun has another name altogether: parasol." The word "parasol" is in apposition to the noun phrase "another name altogether." How NOT to Use Colons We note in this aside that a colon is not used to separate asubjectfrom...
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to be a conference call. 11.b she doesn't think his wife cooks well. 12.c receptionist 13.b difficulty getting up downstairs. 14.d compare price. 15.b go on a boat trip. 16.d increasingly more important. 17....
Such ads hurt an app’s reputation (声誉) because fewer users may want to use them after being taken to other apps too many times. To get real recognition (认可) from users, the apps should respect their choices and provide them with ads that they can choose to click on only if they...
Here are some examples: However,she didn’t love him back. On the other hand,it might be best to wait until next week. Rule #3: Use a Comma Before a Quotation You should always put a comma immediately before a quotation: He said,“It’s warm today.” ...