Femtogram
毫微微克(10的-15次方克)
🗣️ 情景例句
I hear they intend to marry.
我听说他们打算结婚。
Where can you pick up your suitcase?
你在哪里取你的手提箱呢？
As she emerged from her drifting cloud of gun smoke with the water churned to foam beneath her bow,
当"瓦萨号从弥漫的礼炮烟云中出现时，船头下浪花四溅，