Although he had looked throught all the reference material on the subject,he still found it hard to understand this point and her explanation only added to his confusion.

add to：增加

By 1970,according to a world wildlife fund report, only about 4500 tigers survived throughout the world --half of them in India.

according to：根据

One day,however,he was mach surprised to find the book missing from its usual place and was about to leave when he noticed the owner of the shop nodding to him.

be about to：立即

The evolutionary theory accounts well for differences in sleep among creatures.

accounts for：说明（原因）

我把素描的练习都转移到“我的作品集”中，以后也只在那里收录我的习作。今天开始我要试着学习英语。

英语很重要。毕竟扔了很多年，重新拿起来学习，对自己的要求也不高。哪怕每天只记住一个单词，一个句子也可以。嗯，就这样。

不知道从什么地方开始。无意中找到一本书：英语4级词组。嘿嘿管它呢，先拿来啃一下再说。

The soldier was accused of running away when the enemy attacked.

accuse of：控告，谴责 

run away：逃跑

OK~

end today~