Constitute an obstacle
构成障碍
🧩 词语组成解析
an
[æn]
art. 一（在元音字母前代替不定代词a）;一任一某一;一个;
🗣️ 情景例句
Frank, you've never played charades?
Frank，你从来没玩过哑谜？
If I went with you,I'd have to be back by six o'clock
如果我与你一起去了，我将不得不在6点钟回来。
It's a bus.
一辆公共汽车。