Biotoxin
生体毒素
🗣️ 情景例句
I want to send this letter to China, by air mail.
我想把这封信航空邮到中国。
Take a closer look!
你给我看清楚一点！
Spirits labelled 95 proof contain only about 47 percent alcohol.
强度标为95的酒中含47％的酒精。