Refuse is collected twice a week.是什么意思？

Refuse is collected twice a week.

垃圾每周收两次。

refuse

v. 拒绝，回绝，推却；n. 废弃物，垃圾；

例句
I absolutely refuse to get married...
我决不结婚。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

collected

adj. 镇定的，收集成的；v. 收集( collect的过去式和过去分词)；

例句
...data collected by an army of volunteers.
由大批志愿者收集的资料

twice

adv. 两次，两倍，两遍；

例句
Although he was twice as old as us, he became the life and soul of the company.
虽然他的年纪是我们的两倍，但他却成为了公司的灵魂人物。

week

n. 一星期，周，工作周（一个星期中的工作时间）；

例句
The subject of the talk is announced a week in advance.
会谈的主题已提前一周宣布。