回答如下:
英語短語of+ 抽象名詞相當於形容詞。常見的抽象名詞有:importance,necessity, use, significance, help, value等。現用4of + 抽象名詞=形容詞"造句如下:
It is of importance (= is important)to grasp English. 
His experiment is of great value (= is very  valuable). 
This book is of help (= is helpful )to our study. 
It is of great necessity (= is very necessary ) to give up the work. 
Waiting here is of no use(= is useful). 
1、People often give very different accounts of the same event.人們常常對同一件事的敍述大為不同。
2、The problem is of the same order of magnitude for all concerned.這個問題對有關各方的影響是一樣大的。