Like a frozen asteroid belt , it 's littered with chunks of ice and frozen methane and ammonia .
象一个冰冻的小行星带一样,它的上面布满冰柱及凝固的甲烷及氨。
But why water and not , say , hydrogen peroxide or even ammonia ?
可是,为什么是水,而不是双氧水或是氨水呢?
One of these is a mixture of ammonia and water .
其中一种是氨水混合液。
These cooling sticks are 7.6-meter-long steel tubes drilled into the soil ; they contain ammonia , which draws latent heat out of the soil as it evaporates .
这些冷却棒是7.6米长的钢管,被钻入土壤;其中含有氨水,其挥发时可以吸收土壤的潜伏热。
It uses no toxic cleaning agents like ammonia or formaldehyde , and checks the allergies of clients and their pets to avoid using materials that might aggravate those conditions .
Many variables explain this , but the most important is that farming in these heavily populated countries ( unlike that in america ) emits huge amounts of ammonia .
To quantify the animals ' greenhouse gas footprints , the team measured the five insects ' growth rates and their production of the greenhouse gases and ammonia - also a pollutant but not a greenhouse gas .