Femtogram
毫微微克(10的-15次方克)
🗣️ 情景例句
Large or Little?
大杯还是小杯？
Love and poverty are hard to hide.
爱和穷难隐瞒。
A fine rain began to fall on our heads and the temperature had dropped.
一阵小雨落到我们头上，气温开始下降了。