衰落区,将沦为贫民窟的地区;
Getting diseases easily; high rate of blighted grain and leading to a low output The effective silicon content of irrigating water used in rice field is: in the coastal area, the average content is 12 92 mg/ kg;
水稻田灌溉水有效硅含量:沿海地区平均1292mg/kg;
纳米英语 · 双语娱乐资讯
纳米英语 · 高考英语