Pennone
四甲基-2-戊酮
🗣️ 情景例句
The school was attended almost entirely by local children.
上这所学校念书的几乎全是当地的孩子。
If two men ride on a horse, one must ride behind.
两人同骑一马，必有一人在后。
I arrived in London at last.
我终于到了伦敦。