Mmpa
abbr. Marine Mammal Protection Act 海洋哺乳动物保护法; mercaptomethylphosphonic acid 巯基甲基膦酸
🗣️ 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。
You can't eat your cake and have it.
不能既要吃饼，又要把饼保存。
What time is it?
几点了？