Between 1850 and 1910 the bison population is thought to have fallen from 60 million to just a few hundred.
人们认为,在1850年到1910年之间,野牛的头数从6,000万头降到只有几百头了。
The last question is what to read.
最后一个问题是读什么。
Among the different types of bee, it is the honey bee that has most interested scientists because of the language they use to communicate with each other.