Femtogram
毫微微克(10的-15次方克)
🗣️ 情景例句
That's nice.
很好。
As this is a special offer, we hope you won't miss this opportunity.
因这是特殊报价，希望您不要错失良机。
The second marks the arrival of transverse vibrations which travel more slowly and arrive several minutes after the first.
然后记录下的是横向波的到达，横向波比纵向波传播得慢，在纵向波到达几分钟后才能到达。