Contaminated catalyst
[建] 沾污的催化剂
🧩 词语组成解析
a. 受污染的；弄脏的
🗣️ 情景例句
Is there any more plain paper?
还有没有更多的白纸？
As soon as he comes, we'll let him know.
他一来，我们就告诉他。
We have learnt to expect that trains will be punctual.
我们已经习惯于相信火车总是准点的。