词性: 形容词，动词。
adj. 培训；训练过的，受过培训的
v. 训练（train的过去分词）
I trained as a ballet dancer.
我受过做芭蕾舞演员的训练。
Dogs can be trained to obey orders.
狗可以训练得听从命令。
I hadn't trained enough for the game.
对比赛我训练得不够。
Peter is a classically trained pianist.
彼得是个受过传统技能训练的钢琴家。
The dogs are trained to sniff out drugs.
这些狗是经过训练的嗅毒犬。
