VOA慢速英语:Mentors Try to Improve Lives of Homeless Children

call attention to引起对…的注意

例句：We thank you for the past favour, and we wish to call attention to the signature at foot.
      感谢您以往的关照，并望注意下面的签名。

2.Experts estimate that one in every fifty children in the country is homeless at some time during the year.

sometime,sometimes,some time,some times用法区别

sometime

    （1）副词：某个时候。可指过去或将来的某个时候。如：

    ① Would you come to the cinema with me, sometime? 赏脸找个时间和我看场电影吗？(将来)

    ② We’ll take our holiday sometime in August. 我们会在八月找个时间度假。（将来）

    ③ I bought this sometime last summer. 这是我在上个夏天买的。（过去）

    ④ This mansion was built sometime around 1980. 这栋大厦是1980年左右建的。（过去）

    （2）形容词：前，过去的。意思类似former。

    ① This is our sometime general manager.这是我们的前任总经理。

    ② Our sometime classmate, Rose, is now a pop star. 我们以前的同学罗斯，现在是明星了。

sometimes 副词：有时候。顺便提一下，at times也是“有时”的意思。

    ① Every man is a fool sometimes, and none at all times. 每个人有时都会犯傻，但没有谁会一直都傻。

    ② I sometimes have letters from him. 有时我会收到他的来信。

some time 某段时间。常与for连用。

    ① We plan to stay in Hainan for some time. 我们打算在海南呆上一段时间。

    ② I will keep the computer for some time, so you can use it.这部电脑我会留着一段时间，你可以用。some times 几次。several times也可以表示“几次”，但比some times较确定。time作可数名词时可作“次数”解；表示“时间”时是不可数名词。

    ① I am sure that we have met some times before.我肯定我们之前见过几次了。

    ② The newly bought microwave oven failed to work some times.新买的微波炉坏了几次了。

3.I think it's so important for people that want to make a difference in their community to look at where the needs are.

make a difference有区别,有很大关系

例句：Regardless of your circumstances,you can make a difference.
      不管所处的条件如何，你可以出人头地，特别是在你现任的工作中。