The term of validity of identification papers or residence certificates shall be determined according to the purposes of entry.

身份证件或者居留证件的有效期限，根据入境的事由确定。

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To provide rich visual feedback, the entry field could change colors to reflect its estimate of the validity of the entered data.

为了提供丰富的视觉反馈，可以改变输入字段的颜色来反映对输入数据有效性的判断。

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When testing the validity of an entry method it is best to begin by simply exiting the trades after a number of bars.

当检验一种入市策略的有效性时，最好选用简单的离市策略，比如进场一段时间后就出场。

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It ought, therefore, to resemble one of them after re-entry, and will thus provide a way of assessing the validity of the experiment.

ECONOMIST: Meteorites

Taking into account the significant progress achieved by our negotiators, we are working on a new agreement to issue, as a general rule without unduly formalized invitations and justifications, multiple-entry visas for eligible business travelers and tourists of 36 month validity at a unified and reciprocal fee, as well as the issuance of 12-month, multiple-entry visas for official representatives of our countries.

WHITEHOUSE: The White House