It includes element validity check, element quality check and element size check.
单元检查包括单元合法条件的检查，单元质量条件检查和单元尺寸检查。
Take the time to check out the validity of an offer.
花时间检验提议方的合法性。
The third officer should often check the number of life-saving signals, validity and status.
三副应当经常检查救生信号的数量，有效期和状况。
Check the validity of a board at any stage.
在任何的阶段检查董事会的有效性。
How to: Check the Validity of a Cached Page.
如何：检查缓存页的有效性。
How to: Check the Validity of a Cached Page.
如何：检查缓存页的有效性。
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