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雷达卡
Unit 7 Will people have robots?
1. dangerous adj. 有危险；不安全
e.g. Some animals are in great danger. 一些动物处于极大危险中。
名词danger +后缀ous → dangerous
Lions are dangerous animals. 狮子是危险动物。
fall down 突然倒下；跌倒；坍毁
2. factory n. 工厂
e.g. There will be more factories in the future. 未来会有更多工厂。
e.g. The house might fall down in a few months. 几个月内这所房屋可能就会坍毁。
3. fall v. (fell/ fel/) 坍毁；跌倒；掉落
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