例句：
1、It is of the same load as a 737 jet.
它的负载与737喷气式飞机相同。
2、0It is of first importance to spread cultural and scientific knowledge among the people.
普及文化科学是头等重要的。
3、It is of the greatest usefulness.
它是极有用的`。
4、It is of convenient length.
它的长度合适。
5、Although longitudinal diffusion is most rapid, it is of practical importance.
虽然纵向扩散速度最快，但其具有重要的现实意义。