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。
Another good reason for taking a part-time job is that employers usually prefer to hire someone who has already had some work experience. They value someone who leads an active life and is anxious to learn. For example, a newspaper might employ you if you