I don't know since when I changed in such a cold-hearted guy.

我也不知何时开始，我变成了如此冷酷的家伙。

youdao

But an, how can I tell u, I don't know since when, I has been afraid of white.

但是安，我该怎么跟你说那，不知道从什么时候开始，我就惧怕这种白色。

youdao

I don't know if she's right or not, but I do find one aspect of her work striking: Since when did we start to worry that the social kids were spending too much time with computers?

我不知道她到底对不对，但我发现她的研究有一部分还是很有新意的：我们是什么时候开始担心孩子们把过多的时间花在电脑上的？

youdao

"No, since I'm in an area where I don't know where the enemy could be, from when I get on the airplane 'til I get off the airplane, I'm thinking the same way, " Maj.

CNN: Refueling 500 feet over Iraq 'keeps you on your toes'