She gave it her best thought from time to time, for two or three days—but it baffled her—defeated her.

一连两三天，她不时专心致志地思考着这一问题，但是毫无头绪，以失败而告终。

youdao

She gave it her best thought from time to time, for two or three days—but it baffled her—defeated her.

一连两三天，她不时专心致志地思考着这一问题，但是毫无头绪，以失败而告终。

youdao