I'm sorry to have done that. I didn't mean to be so rude.

我为那样做感到抱歉。我并不想那样粗鲁的。

Here it is.

给您。

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。

He had found his family, and his roots at last!

他终于找到了他的家族，他的“根”了！

Oxygen is widely used in ship repairs for cutting and joining metal plates or pipes.

在船舶修理过程中，常常使用氧气切割和焊接金属板或金属管。

They took with them dogs, rats and plants like the sweet potato,and settled mainly in North Island where the weather was warmer.

他们随身带去了狗、老鼠及像红薯之类的植物，并且大部分定居在气候比较温暖的北岛。