下降
verb B1- to decline
- to drop
- to fall
- to go down
- to decrease
Its characters
From the library
缺乏睡眠的危害远不止于此：注意力下降、情绪不稳，甚至免疫力减弱，都与之有关。
首先，树木能够吸收灰尘、降低噪音，夏天还能为街道遮阴，使周围的气温下降好几度。
随着年纪的增长，他们的视力和记忆力都在下降。
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