The partisans lay up by day and by night sallied out to attack convoys.

游击队白天隐蔽起来，夜晚出动袭击敌人的护航舰队。

youdao

I watch the house by day and by night. I keep thieves from stealing my master's property. Where would you all be but for me?

我部分白昼黑夜看守房子。有我在，小偷不敢偷取主人的财产。没有我，你们还会在么？

youdao

You can overcome any mental conflict regarding wealth by affirming frequently, “By day and by night I am being prospered in all of my interests.”

你可以克服任何有关财富的心理矛盾，你需要做的是，不断肯定地对自己说，“日日夜夜，我所有的财富利益都在不断上涨。”

youdao

By day and night,never stopping, biting at his nose, biting at his feet, the wolves stayed with him until the end.

VOA: special.2010.02.27

Then shalt thou have relief by day and rest by night."

那么你便可以白天放松，晚上安息了“

耶鲁公开课 - 旧约导论课程节选

Later,a stagecoach could make the trip in thirteen to fourteen days by moving day and night and changing animals often.

VOA: special.2009.03.30

The switch to the Sonora desert and nearby mountains baking by day and freezing by night has made crossing more hazardous in other ways.

ECONOMIST: Mexico's northern border

They lived a stone's throw from the Medina, wrote by day and cooked by night a simple existence, and all the more intensely lived for being so.

WSJ: Cold-Snap Couscous

Now, after a week of Sudafed by day and NyQuil by night, I sometimes can't tell whether I'm coming or going--and the loony bin doesn't seem far off.

FORBES: When to Disclose an Illness