日期:
来源:雅诚德英语网
Springs and rivers that drain into lakes carry dissolved nitrates and phosphates.
流入湖中的泉水和河水携带了溶于水的硝酸盐和磷酸盐。
Springs and rivers that drain into lakes carry dissolved nitrates and phosphates.
流入湖中的泉水和河水携带了溶于水的硝酸盐和磷酸盐。