Specializes
v. 专门从事, 专攻( specialize的第三人称单数 )
🗣️ 情景例句
There are abundant free materials available on the internet.
因特网上有丰富的免费资料提供。
I haven't seen you for a long time.
好久没有见到你了。
There was another unknown man.
还有一个不认识的人。