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1、提高意味着改进。

2、示例：

3、(1) When the economy is weak, it is difficult for suppliers to raise prices. During the recession, it is difficult for suppliers to raise prices.

4、卡尔甚至连笑一笑的力气都没有。卡伦没有力气微笑。

5、(3) forcibly lifting heavy objects will lead to an increase in blood pressure. Lifting heavy objects hard will lead to an increase in blood pressure.

6、They want to improve the level of the school. They want to raise the standards of the school.

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