日期:
来源:雅诚德英语网
Agricultural run-off and pollution from power plants are adding extra nitrogen to many bogs in North America.
农业排水和来自发电厂的污染给北美的许多沼泽增加了额外的氮。
Agricultural run-off and pollution from power plants are adding extra nitrogen to many bogs in North America.
农业排水和来自发电厂的污染给北美的许多沼泽增加了额外的氮。