这取决于该星期几。

It depends on which day of the week.

今天星期几？

What day of the week is it?

今天星期几？

What day ( of the week) is it today?

他推算出圣诞节该是星期几。

He has calculated the day of the week on which Christmas will fall.

吉姆在星期天干几份工作，但至今他的收入仍很低。

Jim does some pieces of work on sunday, but his earnings to date are small.

他这个星期安排了几次演讲。

He has a number of speaking engagements this week.

星期二，几只斗牛獒犬突然袭击它们的主人，在警察赶到之前狗的主人已经死亡。

The dogs attacked the man in his garden tuesday, killing him before the police arrived.

我几乎撑过了这两个星期。我只有几天时间去做。

I almost lasted the two weeks. I only had a couple of days to do.

基于广义相加模型的Poisson回归，运用自然立方样平滑函数，控制时间的长期变化趋势和季节性趋势、星期几效应、相对湿度等混杂因素，拟合时间序列回归模型。

For the time series regression, we fitted the Poisson generalized additive model, after adjustment for long-term and seasonal trends using natural cubic smooth splines, day of week, and relative humidity.