Unpolluting
(unpollute 的现在分词) 未污染
🗣️ 情景例句
We can write letters. It's cheaper than calling.
我们可以写信就好，那比打电话便宜。
It never rains but it pours.
祸不单行。（不鸣则已，一鸣惊人。）
He gets a good salary, but he always borrows money from his friends and never pays it back.
他的薪水很高，但他却总是向朋友借钱，并且从来不还。