一成不变

This distinction isn't hard and fast.

这差别并非是成不变。

Undiversified tobacco companies stand to lose if there were a mass migration to smokeless products like Snus.

如果有大量如鼻烟这无烟烟草产品流入，成不变烟草司将亏损。

I suddenly realized one day that I’d been in a rut for years: same job, same flat, same friends, same holiday every year …

突然有天我意识到我已经过了好多年成不变生活：同工作，同寓，同朋友，每年度假也?

FOR MOST OF ITS 100-YEAR HISTORY, NEUROSCIENCE has embraced a central dogma: a mature adult's brain remains a stable, unchanging, computerlike machine with fixed memory and processing power.

经科学100年历史当，大多信奉著心思想：成年人脑子是稳定、不变、如计算机般机器，有著成不变记忆与资讯处理能力。

In the morning, when we were already at the dock in Cienaga, my grandfather stood shaving with his straight razor, the door open and the mirror hanging from the frame.

他还没穿衬衫，但是在汗衫上系了他成不变吊裤带，宽宽，带着绿色条纹。刮胡子时候他不停地跟名男子说话，我现在还能眼认出那人来。

Each individual’s youth faithfully repeats that of his forebears, introducing him to a role that lives on unchanged: it is a “pre-scribed” youth, which, to quote Mannheim again, knows no “entelechy.

每体青年时期忠实地重复着他祖先足迹，使他成为成不变角色：这是模仿前辈年轻，再次引用曼海姆话，叫做没有“实体”年轻。