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be proficient in
US
・
UK
A1 初級
phr.
片語
精通
She is proficient in several languages.
影片字幕
關於忍者的一切 (All About Ninja)
03:53
you were expected to
be proficient in
poisons, explosives, medicine
你還要精通下毒、爆破、醫藥
B2 中高級
How Flight Attendants Are Trained
06:10
They come back to training, and they do have to
be proficient in
their door evacuations, in their EMV scenarios, CPR, security.
他們回來培訓，確實要熟練掌握他們的門禁疏散、EMV場景、心肺復甦、安全。
B1 中級
