?植保机械
中国最大的综合性文献数据库 -维普资讯 关键词: 农业院校 植保机械 教学改革[gap=502]Key words: Agricultural academy ;Equipment for plant protection ; Teaching reform
The NRC proposed that plant owners provide reasonable protection for emergency equipment, but did not define how to meet this requirement.
CNN: Our reactors still vulnerable, a year after Fukushima
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。