Manatees
(manatee 的复数) n. 海牛
🗣️ 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。
What about…
不如这样……
international standards of water treatment are usually followed at bottling plants.
装瓶厂通常遵循国际水处理的标准。