Refractions
(refraction 的复数) n. 折光, 折射\\n[医] 折射, 屈光
🗣️ 情景例句
Thank you. Good-bye. Bye, Gerald.
谢谢。再见。Gerald 再见。
Let me lend it to you.
让我借给你。
It is fairly clear that sleeping period must have some function,
很清楚，睡眠必然具有某种作用。