Levulinate
乙酰丙酸
🗣️ 情景例句
We did?
我们忘了吗？
I haven't seen you for a long time.
好久没有见到你了。
Many pedal their tricycles, but most of them prefer to push or drag them.
很多孩子用脚蹬车，但多数孩子更愿意推或是拉着三轮车。