I became very curious about why Koch's method had worked for me when all else had failed.

我变得很好奇，为什么科克的方法已经为我工作时，一切都失败了。

youdao

I became very curious about why Koch's method had worked for me when all else had failed.

我变得很好奇，为什么科克的方法已经为我工作时，一切都失败了。

youdao