VOA慢速英语2012.11.21 的, voluntary, companies, government, 评估

Rebecca949

Safety assessments are voluntary when companies ask the government to approve new GM crops. These assessments often include ninety-day rat feeding tests. This is the international standard. And Alison van Eenennaam says longer studies have not found major problems.当各公司请求政府通过新的转基因作物时,安全评估是自愿进行的.评估内容包括90天的喂食老鼠实验,这是国际标准.Alison van Eenennaam表示长期研究并没有发现重大问题.
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随风飘2009

不错，来听听啊

李功林

jeric_peng

can't play...why?

jeric_peng

very nice