Nanoparticles
纳米粒
🗣️ 情景例句
Thank you.
谢谢你。
Dumb dogs are dangerous.
哑犬最凶恶。
He found it very difficult to get to sleep and he was rather angry with the man upstairs.
他觉得这样很难入睡， 他对楼上的人相当生气。