英语语法分析

After reading for a few hours on lungwort, it dawned on her there was on the threshold.

在读了几个小时关于疗肺草属的资料后，她突然意识到，家里门槛处就有一棵呢。

After reading for a few hours on lungwort, it dawned on her there was one pressing the threshold.

在读了几个小时关于“疗肺草属”的资料后，她渐渐意识到，家里就有一棵正压着门槛呢。