But the quantification of nitrous-oxide emissions is still not well understood, says Dr Williams, so it is not clear which model to use.
But the quantification of nitrous-oxide emissions is still not well understood, says Dr Williams, so it is not clear which model to use.
但是，威廉姆博士说，一氧化二氮气体的具体排放量目前还没有人们完全了解，因此也无法决定该具体使用哪一种模拟方式。