行之有年

It's been a long time

以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译

1
仪容整洁和个人卫生的考究已经行之有年了。
Grooming and personal hygiene have been around for ages.
2
因为习惯的养成已行之有年，无法瞬间被改变。
They've been established over years, so they can't change in a snap.
3
自洁式表面的销售主张相当明确不说，事实上汽车及窗户用的自洁涂层已经行之有年。
The selling proposition of a self-cleaning surface is obvious and in fact self-cleaning coatings for cars and windows have been around for years.

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