托福听力荟萃 67（在线收听）

Word comes from California of a new weapon in the war on_____,______. Two scientists working for a firm in Anaheim, California, have developed a method to eliminate insects without using dangerous chemicals. The new poison? Hot air. The basic idea is that insects cannot adjust to temperatures much above normal. In laboratory experiments,______and______can't survive much more than a quarter of an hour at 125 degrees Fahrenheit, or about 50 degrees______. The new method involves covering a house with a huge tent and filling it with air heated to around 65 degrees centigrade. Hot air is forced in with fans, and the tent keeps the heat inside the house. Since termites try to escape by hiding in wooden______, the heat treatment must be continued for a full six hours. But when it's all over, and the insects are dead, there are no___________to endanger humans or pets, and no funny smells. Scientists claim that there is no danger of fire, either, since very few household materials will burn at 65 degrees centigrade. In fact, wood is prepared for construction use by drying it in______at 80 degree centigrade, which is______hotter than the air used in this procedure.

【填空答案】

household: adj. connected with looking after a house and the people in it 家庭的，家用的，家务的

pest: n. ［C］a small animal or insect that destroys crops or food supplies（毁坏庄稼或食物的）有害小动物（昆虫）；害虫

cockroach: n. ［C］a large black insect often found in old or dirty houses 蟑螂

termite: n. ［C］an insect that eats and destroys wood from trees and buildings 白蚁

centigrade: n. 摄氏度

beam: n. ［C］a long heavy piece of wood or metal used in building houses, bridges etc 梁，横梁

toxic: adj. containing poison, or caused by poisonous substances 有毒的；由有毒物质引起的

residue: n. ［C］technicala substance that is left after a chemical process【术语】（化学）残余物，渣滓

oven: n. ［C］a thing inside which food is cooked, shaped like a box with a door on the front 烘箱；烤箱，烤炉

substantially: adv. when considering the most important parts 主要地；大体上，基本上

【听力原文】

Word comes from California of a new weapon in the war on household Word comes from California of a new weapon in the war on household pests. Two scientists working for a firm in Anaheim, California, have developed a method to eliminate insects without using dangerous chemicals. The new poison? Hot air. The basic idea is that insects cannot adjust to temperatures much above normal. In laboratory experiments, cockroaches and termites can't survive much more than a quarter of an hour at 125 degrees Fahrenheit, or about 50 degrees centigrade. The new method involves covering a house with a huge tent and filling it with air heated to around 65 degrees centigrade. Hot air is forced in with fans, and the tent keeps the heat inside the house. Since termites try to escape by hiding in wooden beams, the heat treatment must be continued for a full six hours. But when it's all over, and the insects are dead, there are no toxic residues to endanger humans or pets, and no funny smells. Scientists claim that there is no danger of fire, either, since very few household materials will burn at 65 degrees centigrade. In fact, wood is prepared for construction use by drying it in ovens at 80 degree centigrade, which is substantially hotter than the air used in this procedure.

【参考译文】

这是来自加利福尼亚的一个消灭家里害虫的新武器。两个在加利福尼亚阿纳翰一家公司工作的科学家，已经开发了一种不用危险化学制剂就能消灭害虫方法。一种新型毒药？是热空气。最基本的想法是昆虫不能适应比正常气温高太多的温度。在实验室的试验中，蟑螂和白蚁在125华氏度，或者说50摄氏度下生存不超过25分钟。新的方法包含将房子盖在一个大帐篷下，然后用加热到65摄氏度的空气充满。热气被风扇吹进，帐篷持续加热里面的房子。当白蚁试着通过藏在木头横梁逃跑的时候，加热待遇必须持续整六个小时。但是当一切结束的时候，害虫被消灭，这里也没有有毒的化学残留物危害人类或宠物，而且没有令人不适的味道。科学家声称火也是没有危险的，除了在65摄氏度下一些家具的材料会燃烧。事实上，木头是用基本上高于这个灭虫程序空气温度的80摄氏度的烤箱烘干来用于建设的。