It also said more than one third of all countries at risk of malaria reported a drop in cases of more than fifty percent.

VOA: special.2010.04.20

We may drop one of the recitations, just depending on course size, all right?

我们可能会取消一个复习课，取决于课程大小，可以么？

麻省理工公开课 - 计算机科学及编程导论课程节选

"There is already a drop in supply. Because, on the east side of the river, that is one of the most productive estuaries in the world for oysters.

VOA: standard.2010.05.08