Replacementmaterial
代用材料
🗣️ 情景例句
Why is that?
为什么？
It's the year of 1999.
今年是1999年。
I agree with you. We've got to do something about pollution. It's getting worse.
我同意你的看法。我们得对污染采取措施了。污染越来越严重了。