老年人很难适应新事物
Old people find it difficult to adapt to new things
以上为机器翻译结果，长、整句建议使用 人工翻译 。
老狗学不了新把戏；老年人很难适应新事物。
You can't teach old dogs new tricks.
youdao
谚老狗学不了新把戏；老年人很难适应新事物。
You can't teach an old dog new tricks. (an old dog will learn no new tricks.)
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