一种常见的生理现象，随着年龄增长皮肤松弛等原因，多出现在中老年人当中，天生就有者很少。若成为三角眼就会影响视力，严重时看东西或跟别人说话时还要扬起下颌，看书要用手推着上睑，才能露出瞳孔，这给生活带来很多不便，因此，实时做眼睑皮肤松弛症手术。
对我们大部分人来说，所谓的南瓜雕刻就是笨手笨脚地在南瓜上刻上三角眼和锯齿嘴。
For most of us, pumpkin-carving involves clumsily cutting triangle eyes and a jagged mouth.
满怀希望可以看上一眼“三角洲”，我走向厨房的玻璃门，双手窝在两眼边，向外看了一看。
Hoping to catch a glimpse of the Deltas, I went to the kitchen door, a glass door, and cupped my hands beside my eyes to take a look.
Google Earth上瞟一眼就能看到在尼罗河谷沿途以及远至三角洲东西部的沙漠地带，小规模的私人工程星罗棋布。
As a glance at Google Earth will show, smaller-scale private efforts have eaten up deserts all along the river valley and far to the east and west of the delta.
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