视力
word C2- eyesight; visual acuity
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随着年纪的增长，他们的视力和记忆力都在下降。
其次，电子产品的普及也给孩子们的视力带来了不好的影响。
眼睛在这样的状态下得不到充分的休息，视力自然会下降。
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