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scrape
刮掉；削去
She scraped the mud off her boots.
她刮掉了靴子上的泥。
The kids had scraped their plates clean.
孩子们把自己的盘子擦得干干净净。
observe
观察；注视；监视
同义词：monitor
I felt he was observing everything I did.
我觉得他正在注视着我做的每一件事。
The patients were observed over a period of several months.
这些病人被观察了数月之久。
impertinent
粗鲁无礼的；不敬的
同义词：impolite
an impertinent question / child
没有礼貌的提问/孩子
Would it be impertinent to ask why you're leaving?
问一下你为什么要离开不知是否唐突？
hour
某个时间
You can't turn him away at this hour of the night.
天这么晚了,你不能把他赶走。
