Fire Hydrant

时间：2008-01-23 01:12:48

（单词翻译:单击）

If there is H2O on the inside¹ of a fire hydrant, what is on the outside?

K9P.

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1 inside
n.内部，内脏，内幕；adj.内部的，秘密的，户内的；prep.在...之内
参考例句：
Two minutes later we were inside the taxi.两分钟以后我们已经坐在出租车里面了。 He will be back inside two days.他将在两天内回来。