expert 
专家 ☊ → ☊ → ☊ → 
expert 
เก่ง ☊ gengL 
expert ☊ 
chuyên gia chuyên môn thành thạo like: expert → →
to know very well, be an expert in ☊ 
biết rành ☊ red and expert (red refers to the political criterion, expert the vocational level) ☊ hồng chuyên ☊ advise (sb) on/about sth/about doing sth: We employ an expert to advise on new technology. ☊ advise ☊
an expert on foreign affairs (= political events in other countries) ☊ affair ☊
beat sb: a problem that beats even the experts ☊ beat ☊
claim (sb/sth) to be/do sth: I don't claim to be an expert. ☊ claim ☊
consider sb/sth + noun: consider sb/sth (to be) sth: consider sb/sth (as) sth: He considers himself an expert on the subject. ☊ consider ☊
a consulting engineer (= one who has expert knowledge and gives advice) ☊ consult ☊
an expert in crisis management ☊ crisis ☊
earn sth: He earned a reputation as an expert on tax law. ☊ earn ☊
a computer/medical expert ☊ expert ☊
expert (at/in/on sth): an expert in child psychology ☊ expert ☊
an expert on modern literature ☊ expert ☊
expert (at/in/on doing sth): He's an expert at getting his own way. ☊ expert ☊
Don't ask me—I'm no expert! ☊ expert ☊
to seek expert advice/an expert opinion ☊ expert ☊
an expert driver ☊ expert ☊
We need some expert help. ☊ expert ☊
expert (at/in sth): They are all expert in this field. ☊ expert ☊
expert (at/in doing sth): She's expert at making cheap but stylish clothes. ☊ expert ☊
Bomb disposal experts exploded the device under controlled conditions. ☊ explode ☊
All of them are experts in their chosen field. ☊ field ☊
Experts put the real figure at closer to 75%. ☊ figure ☊
forecast sth: Experts are forecasting a recovery in the economy. ☊ forecast ☊
They have at last decided to enlist the help of experts. ☊ help ☊
leading experts ☊ leading ☊
a panel of experts ☊ panel ☊
partnership with sb/sth: He developed his own program in partnership with an American expert. ☊ partnership ☊
Deciphering the code requires an expert. ☊ require ☊
Tom's our resident expert (= our own expert) on foreign movies. ☊ resident ☊
A team of experts has/have been called in to investigate. ☊ team ☊
expert ☊ je ne prétends pas être expert en la matière ☊
expertise ☊ il y a également beaucoup d’expertise ☊