From 1830 onwards in the USA and from about 1870 in Canada, settlers began to move westwards and to take possession of the plains as their own.
美国自1830年起,加拿大从1870年左右起,殖民者开始向西迁移,并把平原据为己有。
However, in recent times the old-age pension has only been paid to the poorest people because there has been an increase in the number of people out of work.189
然而阳近一段时间,老年养老金只付给那些最穷的人,因为失业的人数一直在增长。
Von Frisch wanted to find out whether the dance told them how far away the feeding place was.