?? 詞語(yǔ)組成解析
[化] 白櫟皮; 櫟
??? 情景例句
I don't get it.
我不明白。
My schedule is very flexible, and I am given a lot of freedom.
我的工作表很有變通性，使我十分自由。
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低點(diǎn)）、浪高（從波谷到浪峰的垂直距離）