Nanogram
[化] 纳克
🗣️ 情景例句
I'm new here, can you help me find my way around?
我是新来的，你能带我转转吗？
They are so busy these days, that they don't even have time for their friends.
他们最近忙得没法和朋友见面。
So was born the echo-sounding apparatus, now in general use in ships.
这样就产生了目前各种船舶上普遍应用的回声探测仪。