Triatomics
三原子物
🗣️ 情景例句
Things look black.
前途暗淡。
Knowledge advances by steps and not by leaps.
知识只能循序渐进，不能跃进。
Goats are also kept. Apart from their milk, the wool from their coats is used in expensive clothing.
除了获取羊奶之外，从羊皮上剪下的羊毛还用来制作昂贵的服装。