Allotropical
a. 【化学】同素异形的
🗣️ 情景例句
And here he is--Popo the Clown.
这位就是小丑Popo。
Never swap (or swop) horses while crossing the stream.
骑渡中流莫换马。（指危难时不宜做大变动）
Just a minute. I'll see if I'm free. No, I'm not. I've already got something on that evening.
等一会。我看看是否有空。不，我没空。我那天晚上已经有了安排。