为什么“o'clock”里有撇号（省略号）'？

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An apostrophe is used in o'clock because the word is a contraction of the phrase "of the clock." Just like other contractions, the apostrophe takes the place of missing words or letters from a longer word or phrase. For example, the apostrophe in "don't" takes the place of 'o' in the word "not," and the apostrophe in "you'll" takes the place of 'wi' in the word "will."

在“o”中使用撇号（省略号），因为这个词是短语“of the clock”的缩写。就像其他缩略语一样，撇号（省略号）取代较长的单词或短语中缺失的单词或字母。例如，“don’t”中的撇号（省略号）取代了单词“not”中的“o”，“you’ll”中的撇号（省略号）取代了单词“will”中的“wi”。

When we use the word o'clock we are saying that it is a particular hour "according to the clock." For example, "it is almost four o'clock" means the same as "it is almost four according to the clock." However, the full phrase "of the clock" is not used by native English speakers. Always use the shortened form, "o'clock."

当我们使用o'clock这个词时，我们是在说这是一个“根据时钟”的特定时间。例如，“it is almost four o'clock”和“it is almost four - according to the clock.”意思相同。然而，以英语为母语的人不会使用完整的短语“of the clock”。他们总是使用缩写形式“o'clock”。