VOA慢速英语:Hand Washing Is Up in Public Restrooms in US

yet用法

yet已经

例句：Have the children come home yet?
      孩子们已经回家了吗?

      This is the biggest underground lake yet discovered.
      这是迄今为止所发现的最大地下湖。

yet用作连词时，与but一样也主要用于转折，意为“但是”“而”：

I have failed, yet I shall try again. 我失败了，但我还要尝试。

The judge was stern, yet completely fair. 法官很严峻，却完全公正。

They are the same, yet not the same. 它们又一样，又不一样。

It is strange, yet it is true. 那真是怪事，然而却是事实。

I’ve been away only for three years, yet I can hardly recognize my hometown. 我仅在外三年，可我几乎认不出我自己的故乡了。

2.In all, they observed about six thousand adults.

in all总共, 合计;总之

There are fifteen books on the first shelf, twenty-one on the second, that makes thirty-six in all.
书架的第一层有15本书, 第二层有21本, 总共是36本。

3.Only sixty-five percent of men washed their hands, compared to all but two percent of women.

all but几乎, 差不多

例句：She all but fainted when she heard the news.
      听到那消息, 她差点晕过去。

4.Almost nine out of ten also said they always wash after using the bathroom at home.

out of表示分数

5.In a public restroom, if you dry your hands with a paper towel, you should also use the towel to shut off the water and open the door.

shut off停止, 关掉

例句：We shut off the motor before we left the workshop.
      我们离开车间以前把马达关掉了。

      The current has been shut off.
      电流切断了。