VOA慢速英语:Using Lasers to Treat Kidney and Liver Tumors

2.expectancy n.期待;期望

例句：Japanese people have a very high life expectancy.
      日本人的平均寿命非常长。

      We were tense with expectancy.
      我们因期待而神经紧张起来。

3.procedure n.程序, 过程；步骤；(尤指)连续步骤

例句：There is a set procedure for making formal complaints.
      要正式提出投诉是有固定程序的。

4.estimate vt.vi.估计; 评价, 评估

例句：The gardener estimated that it would take him four hours to weed the garden.
      园丁估计他给花园除草需要四个小时。

5.moisture n.水分, 水气, 湿气

例句：The moisture in the air makes it humid today.
      今天空气中水气大, 天气很潮湿。

6.intensity n.强烈, 剧烈

例句：The pain increased in intensity.
      疼痛越来越剧烈。

      I didn't realize the intensity of people's feelings on this issue.
      我没有意识到这一问题能引起群情激奋。