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1. The sentence ends with a comma, indicating the pause between two ideas.
句子以逗号结束，表示两个想法之间的停顿。
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2. In mathematics, a comma is used to separate numbers that are not part of alarger number.
在数学中，逗号用于分隔不构成更大数的数字。
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3. The book was written in 1950 and contains over 1000 pages, ending with a comma.
这本书于1950年编写，包含超过1000页，并以逗号结尾。