Fluorides
n. [无化] 氟化物, 氰化物（fluoride的复数形式）
🗣️ 情景例句
Why was she working anyway? She's rich.
真弄不懂她当初为什么要工作。她是有钱人呀。
The best (greatest) fish keep (swim near) the bottom.
好鱼游水底（指：有价值之物不能轻易得到）。
The self-discipline required to drag myself out of bed eleven minutes earlier than usual was considerable.
这就要求我比平时早11分钟把自己从床上拽起来，这种自我约束是很艰苦的。