It was approved by the U.S. Environmental Protection Agency last May and the state of Florida issued an experimental use permit last June.
去年5月，美国环境保护署批准了该技术，去年6月，佛罗里达州颁发了实验性使用许可证。
Experimental use
原声例句
当月 CNN 10 学生英语 2021年5月合集
英语百科
Research exemption
（重定向自Experimental use）
In patent law, the research exemption or safe harbour exemption is an exemption to the rights conferred by patents, which is especially relevant to drugs. According to this exemption, despite the patent rights, performing research and tests for preparing regulatory approval, for instance by the FDA in the United States, does not constitute infringement for a limited term before the end of patent term. This exemption allows generic manufacturers to prepare generic drugs in advance of the patent expiration.
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