VOA慢速英语:Studying White Roofs as a Way to Reduce Urban Heat

例句：Is the child abnormal in any way?
      这孩子是否在哪方面有点不正常?

      This warm weather is abnormal for February.
       二月里这种温暖的天气不太正常。

2.effectiveness n.有效;有力

例句：Bad diction marred the effectiveness of his speech.
      措词不当影响了他演说的效果。

      The drugs work well at first but gradually lose their effectiveness.
      这些药的效果起初非常好，但后来逐渐失效。

3.uNPRedictably adv.不可预见地,不能预料地,无法预言地

4.invasive adj.有扩散危害的; 扩散性的; 蔓延性的

例句：One specific application of interest is non-invasive medical diagnostics.
      一个重要的特殊应用是未发病的医疗诊断。

5.register vt.vi.记录; 登记; 注册

例句：An increasing number of students are registering for degree courses each year.
      每年, 越来越多的学生注册学习学位课程。

      How many members have officially registered in the club?
      该俱乐部正式登记的会员有多少?