Terpadienone
萜二烯酮
🗣️ 情景例句
Just because the other kids have motor scooters is no reason for you to stop riding your bike to school.
只是因为其他的孩子都有电单车上学，不足以成为你不骑车上学的理由。
If he doesn't help him, I will.
如果他不，我将帮助他。
What colour are you going to paint it?
你打算把它漆成什么颜色？