hm~2 in 2003 of Xiangtan city. The discharge volume of CO_2 was 11.864? 2 million t and the absorption volume of CO_2 by forest was(1.402?5) million t.是什么意思_hm~2 in 2003 of Xiangtan city. The discharge volume of CO_2 was 11.864? 2 million t and the absorption volume of CO_2 by forest was(1.402?5) million t.在线翻译_英语_读音_用法_例句