This is really unpleasant stuff, and if it was any good, we wouldn't have this massive increase in mosquitos and we wouldn't have this massive increase in dengue fever.
这真是让人很不舒服的一件事。 然而如果这种方式有效，蚊子的数目就不会增长得这么快， 登革热也不会蔓延得这么迅速。