blind al·ley
noun/ˌblaɪnd ˈæli/
/ˌblaɪnd ˈæli/
- a way of doing something that seems useful at first, but does not produce useful results, like following a path that suddenly stops
行不通的方法；死胡同 - Progress in science cannot be made without exploring blind alleys.
如果不探索死胡同，科学就不可能取得进步。
- Progress in science cannot be made without exploring blind alleys.