I must take issue with your over what you said at the meeting.
我要和你好好谈谈你在会上说的那些话。(take issue with someone: 对某人的观点提出异议。)
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。