Till the leaves turn blue on the evergreen tree.

直到常青树上的叶子变成蓝色.

The cold wind made his lips turn blue.

寒风使他的嘴唇变蓝了。

I watched the water turn blue from my bath beads.

我看着浴盆里的水变成了蓝色。

She vomited and choked, and started to turn blue.

她开始呕吐，呼吸困难，面色开始发青。

It's the same pigment that makes bruises turn blue.

这种色素和让擦伤变青的色素是同一种色素。

Because when you rip this out of a magazine and you pee on it, it'll turn blue if you're pregnant.

因为如果你把广告纸从杂志上撕下来，在上面小便，如果你怀孕了纸会变蓝。