Fluoridation
[医] 氟化
📖 牛津释义
fluoridation
n[U].
🗣️ 情景例句
Lacks confidence and poise is nervous and ill at ease.
信心不足，不够自信，精神紧张，心神不定。
Do you have any luggage?
你有行李吗？
The wooducutter was standing next to a fallen tree, with lots of small pieces of wood in front of him.
伐木工人正站在一棵倒下的树旁，他的前面有很多小片的木头。