To recreate skin tones, I'll use the at symbol because it has quite a large surface area.

为了体现出肤色，我将使用@符号，因为它的占用面积很大。

She had signed up for a new course – modern English poetry – at the adult education centre and now grew wistful at symbols everywhere.

她报名参加了成人教育中心的一门新课程——现代英语诗歌，现在对无处不在的符号越来越渴望。