大家帮帮忙~~这些句子如何翻译啊~~求救啊

1.他们在大海上迷失了方向，听任天气的摆布。（mercy)
They lose their way on the sea and is now at the mercy of the weather.
2.一听到那个坏消息，他们都不禁哭了起来。（at)
They can't help but cry at the bad news.
3.我一点也不奇怪他会生病，他一个接一个的吃冰淇淋。（one after another)
I am not at all surprised that he has been ill since he ate ice-cream one after another.
4.一旦你进了监狱，那么你终生都会被当作罪犯。（label)
You are labelled as a criminal once you are in prison.
5. 植物在保持地球上的生命平衡中起到了关键的作用。（part)
Plants play an important part in maintaining the balance of living things on the earth.
6.由于酒后驾车，他的车撞上了一棵树。（at a result of)
His car ran into a tree as a result of driving after drinking,
7.减少开销的一个办法是周末的时候呆在家里。（cut)
One of the method to cut down the consumption is to stay at home at weekends.
8.我们用来消化食物的氧气是由植物散放出的。（give out)
The oxygen we use to digest food is given out by the plants.
9.只要你有发票，你可以在30天内退回你所有的商品。（as long as)
As long as you have the invoice, you can return al