The parameters before and since allow you to apply time stamps and limit the data retrieved to only those updates that occurred before or after a specific date.

before和since参数可让您运用时间戳进行限制，只检索某一特定日期之前和之后的数据。

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Only half of those there since 1985 or before could say as much.

ECONOMIST: Infatuation��s end

Since most Chinese consumers have never played or seen them before, those games could prove to be gold for Sony.

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More importantly, how many of those people buying tickets for those USC games had never been to a game before or since?

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