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Caused by bovine paratyphoid in 12 months. caused by selenium deficiency in 3 months.
因牛副伤寒引起(12个月)因缺硒引起(3个月)
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It plays a lot of important role in body, and selenium deficiency becomes a global problem.
但是全球缺硒现象非常普遍, 硒缺乏成为全球性的普遍问题.
英汉双解词典包含4367426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。