你好.你的兩句在意義上沒有任何區(qū)別.
注意,由原先的形容詞轉(zhuǎn)變過來的句子通常需要用be of--- 結(jié)構(gòu),如：
1 this book is very useful to us students===this book is of great / much use to us students.
2 this vase is of much value== this vase is very valuable.
3 The two boys are of the same age.= The two boys are the same age.== the two boys are of an age.