It's universally acknowledged that success never comes out of thin air.

人们公认，成功永远不会凭空产生。

youdao

The water that comes into the Delta never flows out into the sea.

哈德逊说：“流到三角洲的水从不流入大海。

youdao

I definitely don't 4 freak out if a black cat crosses my path. And when it comes to things like lucky four-leaf 5 clovers and lucky pennies, I just never believed in them.

我决不会因为一只黑猫在我面前走过而被吓坏，也决不会相信诸如幸运四叶草、幸运便士这类东西。

youdao

It always comes out of someplace you never expected.

FORBES: Opportunity Knocking

Imagine current users of the iphone 5 having to pay Apple a downpayment now for an iphone 9, due out in 10 years, even if it never comes to the market.

FORBES: The Economist: Innovation Almost Dead. Perhaps Not So In Electricity

Out of the darkness that was the Holocaust comes the eternal hope that never again, never again, will we allow that to happen.

WHITEHOUSE: Browse White House visitor logs