Ld
致死剂量
🗣️ 情景例句
That's a nice age. What's her name?
正是美妙年龄。她什么名字？
Thank you for your advice.
谢谢你的劝告。
Because the Moon has only an eightieth of the Earth's mass,
因为月球的重量只有地球的1/8，