an old dog can not learn new tricks

老狗学不出新把戏  detail>>

an old dog can’t learn new tricks

老狗，学不了新招  detail>>

an old dog cannot learn new tricks

老狗难改吠声 老狗学不出新把戏  detail>>

teach an old dog new tricks

使守旧的人接受新事物  detail>>

you can’t teach all old dog new tricks

别教老狗学新招  detail>>

look for the old so as to learn the new

温故而知新  detail>>

learn the tricks of

学习的窍门  detail>>

an old dog barks not in vain

老狗不乱咬/老年人做事有经验 时机失了无法挽回  detail>>

an old dog bites sore

老犬不空吠  detail>>

an old woman dog church

老的妇人  detail>>

old tricks

惯用伎俩  detail>>

an old idea in a new guise

老观念新面貌  detail>>

an old word in a new sense

旧字新义  detail>>

new story of an old soldier

老兵新传  detail>>

learn the tricks of the trade

学到做生意的门路  detail>>

and an old guitar is all he can afford

而他的老吉他都可以  detail>>

be (old) dog at

对…有经验；对…很内行  detail>>

old dog

工作卖力的人 老狗 老家伙 上了岁数的人老手  detail>>