Std.
[医] 皮肤试验剂量
🗣️ 情景例句
We started by making safety equipment for many sports.
我们是以做运动产品的安全器材起家的。
Fire, water, and money are good servants, but bad masters.
水火金钱是忠仆，使用不当是祸首。
I don't mean it.
我不是故意的。