一组必须在某一天突然戒烟，从一天一包烟减到一天零包。

One had to quit abruptly on a given day, going from about a pack a day to zero.

人类在某一天会登上火星吗？

Will men go to Mars one day?

我希望这能在某一天发生。

I hope it happens some day.

又怎么会在某一天后就不存在？

Is life under the sun not just a dream?

在某一天的某一时刻， 咱们将会抵达进站！

On a certain day at a certain hwe, we be to pull into the station.

他并不依赖于自己在某一天的最佳时刻。

He is not dependent upon his best moment in any one day.

调查问及他们在某一天里积极的和消极的情绪。

This asked them about both their positive and negative emotions on that particular day.

可是一个蛋在某一天却会变成一个活生生的动物。

But an egg will someday be a living creature.

在某一天之后他就不在晚上出去了，他也很注重饮食。

He does not go out at night after a certain day, he cares about eating well.

对于那些仍未找到的，不要放弃，可能在某一天你就会突然遇上。

For those who haven't found theirs, don't give up, it might just strike you one day.