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precaution
safety precaution 安全防范措施
precautions against fire 防火措施
I’ll keep the letter as a precaution.我要保存这封信，以防万一。.
shady adj.
1）阴凉的，背阴的 .
We went to find somewhere cool and shady to have a drink.我们找了个阴凉地儿喝了一杯
2）可疑的；非法的
a shady deal 一宗有问题的交易
notice
1)注意；理会；察觉 .
Don’t take any notice of what you read in the papers.别在意你在报上看到的东西。别理会他说的话
Take no notice of what he says.
2)告示
a notice saying ”Keep off the Grass”写着“勿踏草地”的公告牌
Sneer v. 嘲笑；讥讽
sneer at sb./sth. .
He sneered at people who liked pop music.他嘲笑喜欢流行音乐的人
a sneering comment/smile/laugh
讥讽的话/笑容/笑声
sneeringly adv.
