『直到四十年后才鼓起勇气读了《通鉴》一 遍。』现在我要读的书太多，深感时间有限。

『直到四十年后才鼓起勇气读了《通鉴》一 遍。』现在我要读的书太多，深感时间有限。
【正确答案】：It was not until 40 years later that I plucked up enough courage to read through Tong Jian. So many books still remain to be read, and I much regret not having enough time to do it.