Carbon are
[机] 碳弧
🧩 词语组成解析
are
[ɑr]
vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是;
n. 公亩（等于100平方米）;
🗣️ 情景例句
We haven't had any complaint of this kind. Is there any evidence.
我们还从未听过这样的抱怨。有什么证据呢？
They only want to solve domestic problems.
他们只希望解决国内的问题。
Were you in San Francisco at the time of the big earthquake in 1989?
1989年旧金山大地震时，你在那儿吗？