Cyclocompound
环状化合物
🗣️ 情景例句
Because the United States is the most important trade partner.
因为美国是我们最重要的贸易伙伴。
If you sell the cow, you sell her milk too.
蚀了本也输了利。
We were out of the part you needed.
你要的那种零件我们没有货了，