表示把东西“吹掉”时，blow away 与 blow off 有区别。
如：风把她的文件走了，应该说
The wind blew her papers away. √
The wind blew her papers off. X （off 后要接 something）
The wind blew her papers off the table. √
风把她桌上的文件吹走了。
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如果说：to blow someone off 与 to blow someone away, 意思不一样。
to blow someone off 不理睬、 放某人鸽子，忽视某人或某事（to ignore someone
or something; to not attend something where one is expected. ）
I tried to talk to her in the bar, but she blew me off.
我在酒吧想和她说话，但她拒绝了我。
She knew that he had blown her off when he didn't even call her for a month.
当他已经一个月没给她打电话时，她已经知道她被他甩了。
to blow someone away 不是 “把某人吹走” 的意思，而是比喻某人或某物非常好，
让人佩服，印象深刻。
Last night's band concert blew me away.
昨晚的乐队音乐会让我惊叹。
You really blow me away for being so knowledgeable and yet so fun.
你不但知识渊博而且还很有趣，让我佩服得五体投地。
