Femtogram
毫微微克(10的-15次方克)
🗣️ 情景例句
Hold on. Wait a minute, please.
等等。请稍等一下。
Would you be so kind as to open this window for me? It's stuck.
你能为我打开这扇窗户吗？ 它粘住了。
Certainly!
一定。