Chemline
化学数据库
🗣️ 情景例句
What time does the library close?
图书馆什么时候闭馆？
After I get dressed,I have breakfast.
在我穿好衣服后，我吃早餐。
it would be up and down, to and for and from side to side.
呈现出上上下下、来来回回、左左右右3种性质的运动。