Triscyclopentadienyl
三茂
🗣️ 情景例句
What's the nature of the problem?
是什么样的问题？
I've been part of this project since its beginning.
从一开始我就参与这个计划。
Half an hour? That's too long! Is there a bus?
半小时？那太久了！有公共汽车吗？