Definition
余光有两个常见含义。第一个是字面义“剩余的日光”，指傍晚渐暗的光线，相当于“余晖”。第二个更常用的意思是“眼睛侧面的视线”（peripheral vision），当你用眼睛的侧面看而不是正对目标时，说“用余光看”。这两个含义在英文里分属不同单词（twilight vs peripheral vision），所以要根据上下文判断。
n.
evening lighttwilightlast rays of the sunperipheral visionsidelong glance (of the eye)
Examples
- 余光，。Tiān biān de yú guāng yuè lái yuè àn, hēiyè jiù yào láilín.The twilight at the horizon is getting darker; the night is coming.
- ，余光。Tā zuò zài zuìhòu yī pái, yòng yú guāng qiāoqiāo kàn le kàn lǎoshī de biǎoqíng.He sat in the last row and used his peripheral vision to secretly glance at the teacher's expression.
- 余光，。Wǒ yòng yú guāng yī piē, fāxiàn tā zhèngzài cháo wǒ wēixiào.With a sidelong glance I noticed she was smiling at me.
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