Leadless
a. 无铅的
🗣️ 情景例句
What number are you trying to dial?
你要的电话是什么号码？
As you all know, doing business is not an easy thing to do.
大家都知道，做生意并不是一件容易的事。
that intelligent life is bound to be a natural part of the universe.
有智力的生命必然是宇宙的自然组成部分。