The most main feature parameters are near-far degree parameter, the distance of eyelids, mouth corner radian, etc.

其中，最主要的特征参数包括趋避度参数、眼帘间距、嘴角弧度等。

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As the paper towel is added at the opening of the bag body, a user can spit into the sputum bag without having to look for another paper towel to clean the lip or mouth corner;

由于在袋体开口处加装了纸巾， 人们在吐痰后无需另找纸巾擦拭嘴唇或嘴角；

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A smile lifted the corner of his mouth.

他的嘴角挂着微笑。

《牛津词典》

Take the full-grown moustache, for example, with down-turned ends at the corner of the mouth.

BBC: Moustaches under threat

There was a twist in one corner of her mouth, as if something were not right in her stomach.

NEWYORKER: Ziggurat

He had this black cold sore at the corner of his mouth, and his eyes had sunk into his face like little pits.

NEWYORKER: The Pura Principle