This roof can be opened and closed as a whole.
这种屋顶可以作为一个整体而被打开或关闭。
The fish always opened and closed its mouth when it heard the feeding signal.
每当这条鱼听到进食信号，它就不停地张嘴闭嘴。
Compact structure, well to be opened and closed, lower in height, easy maintenance.
结构紧凑，启闭性好、高度小、维修方便。
She opened her medicine cabinet at 12:21 and closed it at 12:22.
她在12：21打开自己的药橱，12：22就又关上它。
The door immediately opened, and, when he was in, closed upon him.
门立刻打开了，然后，当他进去之后，又在他身后关上了。
The project will have to be closed and re-opened at this point.
项目需要关闭并重启到这一点上。
That is a good book, which is opened with expectation, and closed with profit.
充满期待地打开，受益匪浅地合上，这才是一本好书。
That is a good book which is opened with expectation and closed with profit.
使人怀着期待打开、带着收益合上的书就是好书。
It could be a tag that was opened and never closed.
问题可能在于一个打开的，而且永远不能关闭的标签。
There is a good book which is opened with expectation and closed with profit.
一本好书开卷引人入胜，掩卷使人获益。
That is a good book which is opened with expectation and closed with profit.
一部好书，开卷则引人入胜，掩卷则让人获益。
That is a good book which is opened with expectation and closed with profit.
好书开卷引人入胜，闭卷使人得益。
The CEO went to his office, closed the door and opened the third envelope.
这位首席执行官走进他的办公室，关上门，打开了第三个信封。
The manager went to his office, closed the door and opened the third envelope.
经理回到办公室，锁上门，打幵了第三个信封。
Sirius opened his mouth, and then closed it, and remained silent for a long moment.
小天狼星张开口，然后合上，继续沉默了了好一会儿。
Sirius opened his mouth, and then closed it, and remained silent for a long moment.
小天狼星张开口，然后合上，继续沉默了了好一会儿。
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