Bioactivator
生物活性剂
🗣️ 情景例句
I've put an X next to the place where you should sign.
我已在你该签名的地方后面标示了X。
To argue with the opponent about the principles
和反对者争论基本事项
I'm looking for a pair of black shoes.
我在找双黑色的鞋。