For a natural look, use a dark brown instead of a black eyeliner, and just tight line.

为了打造自然的效果，使用棕色而不是黑色的眼线笔，就紧贴眼线而画。

And do a tight water line underneath.

并在下面做一个紧密的水线。

Ma's face was gray and her mouth was a tight line.

妈的脸色灰白，嘴巴抿得紧紧的。