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1.a piece of 一块
He forked an egg onto a piece of bread and folded it into a sandwich.
他用叉子叉了个鸡蛋放在面包上，然后把面包片折起做成了三明治。
2.up to the task 胜任
But I am absolutely convinced that you and we are up to the task.
但我坚信，你们和我们能够胜任这样的使命。
3.survive on 生存
Where once she had been totally self-sufficient, she now had to survive on income support.
她曾经完全能自给自足，而现在却不得不靠收入补助金维持生计。
