Boratofluoric acid
[化] 氟硼酸
🧩 词语组成解析
🗣️ 情景例句
Excuse me. Is this seat taken?
对不起 ，请问这个座位有人吗？
If you lie upon roses when young, you'll lie upon thorns when old.
年青时躺在玫瑰上，老年时就会躺在荆棘上。
OK. We can get some more tomorrow. We should finish the floor now. Can you take the other end of this piece of wood? Now you have to pull it to make the surface smooth like that.
好吧。我们明天再多买些。现在我们应该把地板弄好。你能抓住木板的另一端吗？现在你要来回拉动木板，使它的表面象那块儿木板一样光滑。