Although in theory any adjective can be put before fish, cold is by far the most common one.

尽管在理论上其他形容词同样可以放在fish前，但cold是目前最为常用的词。

youdao

Although in theory it has a display available, in fact it can't just scroll text up the screen.

虽然从理论上来说它有一个显示设备，但是实际上它只能通过在屏幕上卷屏来显示文本。

youdao

Although in theory this method should help you lose weight, it is not the healthiest or most successful.

虽然这种方法在理论上有助于减肥，但这不并是最健康的或最有效的。

youdao

Although in theory the city banks are allowed to issue bonds in the domestic market, the finance ministry discourages this.

ECONOMIST: Japanese finance

Kemp also said that although in theory he's against race-based quotas, he is against Rep. Charles Canady's (R-Fla.) proposed bill to end affirmative action programs.

CNN: AllPolitics - Kemp And 2000

Although, in theory, the monarchy inhabits a realm far above the murk of daily government, it has been an important source of legitimacy for the unelected prime minister.

ECONOMIST: Thailand's political stalemate