For a cursor this is the elapsed time between open and close.
对于游标，这就是打开和关闭游标之间所经过的时间。
These methods open and close the element at the same time.
这些方法同时打开和关闭元素。
What time does the post office open (close)?
邮局什么时候开门(关门)？
你们几点营业/关门？
What time does the supermarket open and close?
这家超级市场何时营业、关门?。
At this time, the hand can conveniently open or close the door and the window.
此时，人手可方便的开启或关闭门、窗。
At this time, the hand can conveniently open or close the door and the window.
此时，人手可方便的开启或关闭门、窗。
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