甲烷最大的來源就是畜牧業，一年可以製造一億噸的甲烷，約85%的甲烷源自

甲烷最大的來源就是畜牧業，一年可以製造一億噸的甲烷，約85%的甲烷源自牲畜的排氣

結果 (英文) 1:

The largest source of methane is animal husbandry, which can produce 100 million tons of methane a year, and about 85% of methane is derived from livestock exhaust

結果 (英文) 2:

The biggest source of methane is livestock, which produces 100 million tons of methane a year, about 85 percent of which comes from livestock exhaust.

結果 (英文) 3:

The biggest source of methane is animal husbandry, which can produce 100 million tons of methane a year. About 85% of methane comes from livestock exhaust