As he looks, he sees a strange expression come over the face of the hostess.
在他这样观察时，他发现女主人的脸上显出一种奇异的表情。
“Water over the dam” is another expression about a past event.
Wateroverthe dam（既成事实）是一个有关过去事件的表达。
Reason about the data in the expression tree, and do custom processing over it.
推断表达式树内数据，并对它做自定义处理。
And if you make a mistake in the middle of a long expression, you have to start all over.
如果在输入一个长表达式中出了错，就得全部重来。
Is Lycidas an appropriate expression of grief over the death of Edward King?
利西达斯是否恰当的表达出对爱德华·金之死的悲痛？
This is an expression we use in English to say that you had such a dramatic fall that your head was over your feet and we use it when we want to say that someone fell madly in love.
这个表达在英语里表示狠狠地摔了一跤，跌了个四脚朝天，也可以用来表示某人疯狂地陷入了爱河！
I looked over to the family to watch their reaction, expecting some expression of outrage.
我回头去看那一家人的反应，希望能看到一些愤怒的表情。
American military thought had coined the expression "over-all strategic objective" .
美国的军事思想家创造了“全面战略目标”这个名称。
American military thought had coined the expression "over-all strategic objective" .
美国的军事思想家创造了“全面战略目标”这个名称。
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