Tooth staining
[医] 牙染色法
🧩 词语组成解析
tooth
[tu:θ]
n. 牙;齿;齿状部份;
vt. 给…装齿;
vi. 啮合;
[医] 染色法, 染色
🗣️ 情景例句
What are you going to do about your appointment
那怎么办
A good conscience is a continual feast.
白日不做亏心事，夜半敲门心不惊。
I do not want to make it a school for rich children only.
我不想把它办成专供有钱人家的儿童来上学的学校。