I'll read the text through and then explain the difficult points.

Such fish is rarely met with in the north country.

这种鱼在北方难得看到.

She seldom comes here.

她难得到这里来.

You are kind to come.

难得你来.

It is unusual to see snow in this region.

这个地区难得见到雪.

We write with the tip of a pencil.

我们用铅笔的尖端写字.

These tests require an extremely sophisticated instrumental effort.

这些试验需要极其尖端仪器才能办到.

In October 1970 moved to site: Baoding Vanguard Road, No.267.

一九七○年十月迁至现址: 保定市前卫路267号.

Don't drag behind others, you'll make us all late.

不要掉队, 你要让大家都迟到的.

Not all had been lost, strayed, or captured.

并不是全部都是牺牲的 、 掉队的 、 或者被俘的.

She grabbed at the fish, but the cat was too fast for her.

她想抓住这条鱼, 可被猫抢先夺走了.

He backed the car out of the garage.

他把车倒退着开出车库.

The horse backed suddenly.

马突然向后倒退.

How beautiful she performs the backward step!

她的后退步跳得多美!

The team got worse annually.

球队一年一年的退步.

If you want to keep your scholarship, don't let your grades slide!

如果你还想继续领奖学金, 你的成绩就不能退步.

He says his family saw this as a retrograde career move.

他表示,他的家人将这一步视为其职业生涯的退步.

It can't be just us good, because that would be a let-down.

不能只是一样好而已, 因为那等于在退步.

Shops that had been backward caught up with those that were advanced.

原来后进的车间也赶上了先进的车间.

The boys were filthy when they came in from football.

男孩们踢完球后进来时身上都很脏.

When a thing is done, advice come too late.

事后进忠告,等于马后炮.