Specialising
v. 专门从事, 专攻( specialise的现在分词 )
🗣️ 情景例句
Well, they didn't say anything for sure.
嗯， 他们没有任何确切的答覆。
Please stop by (drop in) sometime.
请于近日过来坐坐。
He's in bed, doctor.
他在床上呢，医生。