重要的替换词

造句：

1.Study is important, but we should also pay attention to the health.

2.He brushed aside important details.

3.A peaceful social environment is an important condition for economic take-off.

4.The spy stole a lot of important economic information.

5.This case is so important that we won't stop until we get to the bottom of it.

6.The important difference between man and animals lies in his ability to make and use the tools of labor.