Chapter One Diving Under

Because of the lack of the vocaburary，it is a bit difficult for me to comprehensively understand the paragraph. At the same time，my languid condition may influence the understanding of the chapter. For example，when I was so sleepy that I could hardly keep my eyes open，the paragraphes are hard to be read.

Therefore，it may be essential for me to read the chapter twice in order to fully catch the description.