Fiu
abbr. Frequency Identification Unit 波长计
🗣️ 情景例句
You must develop the muscles of your speech organs to produce unfamiliar sounds.
所以你必须训练和发展你的发音器官（声带、舌、口、鼻腔等）的肌肉，以便发出陌生的（另外一种语言）声音。
Oaks may fall when reeds stand the storm.
树大招风。
The seed was sprayed over the ground in huge quantities by aeroplanes.
飞机把这种草籽大量地撒播在地上。