Tcnb
[建] 四氧硝基苯
🗣️ 情景例句
I tried to teach my kids the importance of independence,
我总是告诫孩子们独立的重要。
Is it serious?
我的病严重吗？
from which can be seen the strata the drill has been cutting through.
从中能看出钻头所钻透的地层。