So he keeps on studying after his English classes in order to prepare for life in America.
所以他在英语课下课后还继续学习,为以后在美国生活做准备。
The nomads who made these markings lived by hunting and fishing during the last Ice Age which began about 35,000 B.C.and ended about 10,000 B.C.
这些痕迹是游牧人留下的,他们生活在从公元前约35,000年到公元前10,000年的冰川期的末期,以狩猎、捕鱼为生。