It was tough, but I made it. I'm a college graduate.
那虽然不简单, 但我成功了。 我现在是一名大学毕业生了。
The killing of the bison changed the whole wildlife of the plains. With fewer bison, grass shoots were not eaten, so grass did not grow as strongly.
屠宰野牛改变了平原的全部野生生物。野牛少了,嫩草没有牛来吃了,草就长得不粗壮。