Nanoparticle
纳米粒
🗣️ 情景例句
Who has torn these pages out of the book?
谁撕掉书上的这几页？
One cannot put back the clock.
光阴一去不复返。
The development of films with sound became a problem for Chaplin.
有声电影的研制对卓别林来说就成了问题。