balancing ladder
基本释义
杠梯
实用场景例句
学术讨论
The fog was so dense that driving was dangerous.
雾太浓了，开车很危险。
校园生活
The forest was so dense that we couldn’t see far.
森林太密了，我们看不到远方。
社会活动
The city has a high population density in the downtown area.
市中心的人口密度很高。
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