Femtometer
n. 千万亿分之一公尺
🗣️ 情景例句
You had better study hard.
你最好努力学习。
Please don't forget.
请不要忘记。
Textile business has become more and more difficult since the competition grew.
随着竞争的加剧，纺织品贸易越来越难做了。