Hexylene
己烯
🗣️ 情景例句
We will help your children in learning lessons in their free time.
我们可以帮助您的孩子在他们空闲时学习功课。
Most of them are less than 30.
他们中大多数不到30岁。
I think all the changes are easy to see.
我想所有修改过的地方都很容易看出来吧