I write to her mostly on Sundays.

我大部分是在星期天给她写信。

youdao

I watch TV every week, mostly on Sundays.

我每周都看电视，大部分是在星期天。

youdao

We're mostly out on Sundays.

我们星期天一般不在家。

《牛津词典》

She is mostly out on Sundays.

她周日多半不在家。

youdao

She is mostly out on Sundays.

她星期日通常外出。

youdao

I sometimes stay at home on Sundays, but mostly I go to the parks.

星期天我有的时候呆在家里，但多数情况是到公园去。

youdao

We are mostly out on Sundays.

星期天我们通常不在家。

youdao

We are mostly out on Sundays.

星期天我们通常不在家。

youdao