Tetrahydride
四氢化物
🗣️ 情景例句
Relax, Harry.
不要紧张 ，Harry。
The firemen fight fires and rescue people.
消防队员和火灾搏斗，拯救人们。
Don't worry! We won't leave before nine. We'll wait for you outside the school gate!
别担心！9：00前我们不会出发。我们将在学校的大门外等你！