These problems needed still another solution, and the ingredients for it lay close at hand.

这些问题还需要另一个解决方案，而解决问题所需的条件其实唾手可得。

youdao

These problems needed still another solution, and the ingredients for it lay close at hand.

这些问题还需要另一个解决方案，而解决问题所需的条件其实唾手可得。

youdao