out of the blue

基本解釋

The image of the woman popped into his head out of the blue.
那個(gè)女人的形象突然出現(xiàn)在他的腦海里。
This hardly ever happens out of the blue: there are usually warning signs such as noise, vibration or heat.
機(jī)器是不可能突然故障的：通常機(jī)器在故障前會有告警信號，例如噪音、振動或發(fā)熱。
Then, about 15 minutes down the motorway, out of the blue, he announced I was heading in the wrong direction for Weymouth.
然后大約15分鐘后開下了高速公路，他出人意料地宣布我前進(jìn)去韋茅斯的方向是錯的。

"Most of the fish,shrimp, blue crab they are spawning out in the Gulf right now, and any of those really small larvae fish and crab, is probably going to be killed if they encounter the actual oil spill."
I was taking my younger child home from a play date on Sunday and he asked me out of the blue, ?" "Why can't you marry your mother or your father?"
周日我?guī)业男鹤尤ネ妫丶业穆飞?他突然問我，“你為什么不能和你的父母結(jié)婚“
耶魯公開課 - 心理學(xué)導(dǎo)論課程節(jié)選
and I kind of want to go somewhere that's just out of the blue that I never even thought of,
我想去意想不到的地方，自己根本沒想過的，
為我的生活 - SpeakingMax英語口語達(dá)人

What would you do if your responsibilities at work radically changed out of the blue?
FORBES: What To Do When They Radically Change Your Job