Ubelin
胞胆碱, 胞二胆磷碱
🗣️ 情景例句
How often do you go running?
你多久跑步锻炼一次？
I'm looking for a half-time job.
我在找半工半读的工作。
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。