短语 | appear out of the blue |
释义 | appear out of the blue意想不到的事;意外地出现:Such an important technical innovation is actually made by a common young technician,it really appears out of the blue.这样一个重要的技术创新竟然是由一个普通的年轻技术人员做出,这真是意想不到的事。 |
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