You can't teach an old dog new tricks. (an old dog will learn no new tricks.)
谚老狗学不了新把戏；老年人很难适应新事物。
He is old, and so you can't expect him to change his ways of doing things. You can't teach an old dog new tricks.
他老了，你别奢望他改变他做事的方法，你很难让一个守旧的人接受新事物。
When someone says, "You can't teach an old dog new tricks," it means that people don't change, especially as they get older.
当有人说“人老则守旧”时，表示人不易改变，越老越是如此。
While there it may be common wisdom that it is difficult for older people to learn new skills - e.g., "you can't teach an old dog new tricks" - that appears to be a misconception.
虽然人们普遍认为对于老人来说新技能的学习会比较困难，例如“你不能教会一条老狗新把戏”——但这看起来是个误解。
My secretary has been using that old manual typewriter for more than twenty years and I cannot get to change to a word processor; it seems you can't teach an old dog new tricks.
我的秘书使用那台旧的手动打字机已有20多年了，因而我无法使她改用文字处理机，似乎无法使年老守旧的人接受新事物。
When we look at the tobacco industry, we see that you really can teach a dirty old dog some new tricks.
当我们审视烟草业时，我们看到，陈旧的行业真的可以耍弄一些新花招。
One Web is as old as the Web itself: The 1993 New Yorker joke was that on the Internet no one knows you’re a dog.
1993年，《纽约人》上的一则玩笑说：在网络中，即使你是条狗也没人知道。
When switching dog foods, do it gradually over a week by increasing the ratio of new food to old food. This will help avoid digestive upsets.
当更换狗狗食物是，请在一周时间内，逐渐的增加新食物在旧食物中的比例。这样能够避免狗狗的消化紊乱。
It is important that you maintain the new good habit through practice and praise, or your dog may revive his old annoying barking habits again.
以多练习和多奖励来持续维持狗狗好的行为是很重要的，否则狗狗以前的吵闹吠叫行为又会恢复了。
It is important that you maintain the new good habit through practice and praise, or your dog may revive his old annoying barking habits again.
以多练习和多奖励来持续维持狗狗好的行为是很重要的，否则狗狗以前的吵闹吠叫行为又会恢复了。
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