训练有素

Explanation: Factors usually, always. Usually have been rigorous training. 　　Usage: The main predicate; as object; with compliment 　　Source: Qing Zhao Yi "twenty-two fourteen generals Jia Ding Literary History Volume III" was also a time champion, Suozhi active and refresher trained. " 　　Examples: So neat tight, though a very intense and fast in no way arbitrary, which shows ~, well-deserved reputation. ★ Yao Xueyin "Rereading" Forty-seventh Chapter II Thesaurus:  sage; wise man, Chop wheel adept, connoisseur left-hand side of a running machine, professional training class origin