Fras
(fra 的复数) abbr. 联邦铁路局（Federal Railroad Administration）；联邦储备法（Federal Reserve Act）；流量警报记录器（Flow Alarm Recorder）；自由基型（Free Radical Type）
🗣️ 情景例句
Ah, it does smell sweet.
噢， 它们确实很香。
There have been many ups and downs in our marriage, but we still love each other.
我们的婚姻有很多坎坷，但我们依旧相爱。
If we could actually see the path described by a particle,such as a sand grain in the rock,
假如我们真能看到的运动轨迹，诸如岩石中一个沙粒分子