Out of the blue.
Out of the blue.
当事情“Out of the full tags/attributes are allowed for the form ("form", "width", "height", "include", "exclude", "orderby", "search", "submit", "clear", "add_search_field", "remove_search_field", "content", "label").
Wow, your call was totally out of the blue.
哇,你的电话真是出乎意料。
I received a gift out of the blue today.
今天我收到了一个意外的礼物。
When he showed up at my door out of the blue, I was completely surprised!
当他突然出现在我家门前时,我完全惊讶了!