单词：entrenching tools
单词：entrenching tools 相关文章
Intelligent Crows Use Tools What do otters, chimpanzees, and one species of crow have in common? All three are animals. They also use tools. Scientists have long known that a crow native to New Caledonia is able to use tools. The birds use them to re
2016年VOA慢速英语(九)月
It's March and the madness is upon us, hello, everyone, I'm Carl Azuz. Later on today, we're going to tell you exactly how all of this came together. But we're starting today with an anniversary, it was exactly ten years ago on March 19th, 2003, that
CNN2013年(三)月
To do a job right, you need the right tools. Even a chimp knows that. According to a study in the American Journal of Primatology, chimps in the Congo use multiple tools to capture army ants. Youve probably seen footage of chimps using sticks to har
60秒科学
By Lisa Schlein Geneva 22 July 2007 The International Organization for Migration says only a fraction of the more than 2.2 million people forced to flee their homes in Iraq is getting the basic humanitarian assistance they need. The organization call
2007年VOA标准英语（七月）
DEVELOPMENT REPORT – July 29, 2002: Tools for Development By Jill Moss (Photo -CARE) This is the VOA Special English Development Report. Building things or making clothes can be difficult in develop
农业与发展
By Ron Corben Bangkok 09 October 2006 Burma's government is about to restart its on-again, off-again constitutional convention, which it says will eventually lead to democratic elections. But even as it prepares for the convention, the regime has ar
2006年VOA标准英语（十月）