Dmft
[医][=decayed,missing and filled(permanent)teeth]龋牙，缺牙和充填（恒牙）
🗣️ 情景例句
Robbie pulled a boy out of the water.
Robbie从水中救出一个孩子。
If you remove stone by stone, even a mountain will be levelled.
一块一块把石移，高山也可变平地。
How long did it take you to accomplish this complicated job?
你花了多久才作完这复杂的活儿？