当她找到了佳能数码照相机的广告时，她已经在因特网上查询了两个小时。

She had searched the internet for two hours when she found an ad for the Canon digital camera.

youdao

当她找到了佳能数码照相机的广告时，她已经在因特网上查询了两个小时。

She had searched the internet for two hours when she found an ad for the Canon digital camera.

youdao