In the wild, cockroaches are scavengers that pick up various bacterial organisms such as salmonella while walking through spoiled food, the New York City Department of Health and Mental Hygiene explains on its website.

Hired by the New York City Department of health and mental hygiene, he got named lead investigator in the West Nile virus outbreak.

受雇于纽约市健康与心理卫生部（New York City Department of Health and Mental Hygiene）后，他被任命为首席调查官，负责调查西尼罗病毒爆发的原因。

A: I still have to clean the kitchen and the bedroom.

赶紧！/快一点儿！我还要打扫厨房和卧室。

B: When I asked him to clean up the bedroom, he didn't listen and scattered his dirty clothes everywhere.

我让他打扫卧室，他不听，反而把脏衣服扔得到处都是。

It is your turn to clean up the bedroom.

这回轮到你打扫卧室了。

Mother told Lily how to clean the bedroom.

妈妈教莉莉如何打扫卧室。

The family wash hung from the windows.

那家人洗的衣物从窗口挂了出来。

That morning Nadiya had sent her son off to school and was set to wash the windows and paint the balcony in preparation for May Day celebrations.

那一天，母亲照常送儿子到学校上学，回来后又清洗门窗，油漆阳台，准备迎接5.1劳动节的到来。

Don't forget to wash the windows and shake out your welcome mat for a sparkling first impression.

不要忘记清洗窗户，展开你最喜欢的垫子，打造光彩夺目的第一印象。

They wash the windows on our tallest skyscrapers;

他们为美国最高的摩天大楼擦洗窗户；

So we wash the windows again.

但是窗户依然很脏，所以我们还是得自己冲洗擦一次。

Rabbit: I can wash the windows.

兔子：我可以洗窗户。

We're going to have an English class this afternoon.

今天下午我们要上一节英语课。

How often do you have you English class in a week?

你的英语课一星期有几次？

It is time for him to have an English class.

是他上英语课的时候了。

We have English class on Monday?

我们周一有英语课。

We have English class in the classroom with two electric fans spinning overhead.

我们在教室里上英语课，头顶上有两个电扇在转变着。

I have English class from two to four o'clock.

我下午两点至四点上英语课。

We were about to have English class when a foreigner came in.

我们正要上英语课突然一个外国人进来了。

B: I'll fly to Chengdu to visit my grandparents the day after tomorrow.

B：后天我将飞往成都去看望我的祖父母。

One weekend, I went to visit my grandparents in the countryside.

一个周末,我去乡村看望我的祖父母。