Unicel
二亚硝基五亚甲基四胺(发泡剂)
🗣️ 情景例句
Is Miss Zhang in?
张小姐在吗？
Walls (or Pitchers) have ears.
隔墙有耳。
Before you leave the lab, make sure the electricity is turned off and the windows are shut.
你们离开实验室前，务必要关上电源，关好窗户。