使用一个撇号点因为这个词是一个收缩的“时钟”。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."
当我们使用这个词点我们说这是一个特殊的时刻”根据时钟。”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."
