Femtogram
毫微微克(10的-15次方克)
🗣️ 情景例句
Richard! I haven't brushed my hair. Richard
我头发都没有梳。
It takes two to tango.
一个巴掌拍不响。
but the fire fighters were eventually able to free him by cutting a huge hole in the wall.
消防队员在墙上挖了个大洞，才终于把他解救出来。