showed that if global emissions do not peak and begin to fall by 2020, keeping the global average temperature rise since pre-industrial times below 2C will be difficult.
《自然—气候变化》期刊周末发表的一项研究表明，如果全球排放到2020年没有达到峰值并开始下降，将很难使全球平均气温自前工业时代以来上升幅度保持在2度以内。
Different blocs of countries want the international community to commit to limiting the global average temperature rise since pre-industrial times to 2c or 1.5c, though a few are demanding 1c.
不同的国家集团希望国际社会承诺，将前工业化时期以来的全球平均气温上升限制在2摄氏度，或1.5摄氏度以内，甚至有几个国家要求1摄氏度以内。
It is true that the average temperature rise is only about two degrees, but that has been enough to start the glaciers receding in many parts of the world.
确实，平均气温升高仅二度左右，但这已足以引起世界上许多地区冰川的消退。
Using 10-channel parallel thermocouples to measure the average temperature rise, energy absorbed by castor oil can be obtained.
用热电偶并联测量蓖麻油的平均温升值，计算出蓖麻油所吸收的热能，进而求得换能器的声功率。
Using 10-channel parallel thermocouples to measure the average temperature rise, energy absorbed by castor oil can be obtained.
用热电偶并联测量蓖麻油的平均温升值，计算出蓖麻油所吸收的热能，进而求得换能器的声功率。
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