A major new study in the polar ice sheets has discovered that the rate of melting has accelerated in the past 20 years. David Shukman is our science correspondent.
有关极地冰原的重大研究表明，冰原的融化速度在过去20年间已经加速。科学记者David Shukman报道。
Polar ice sheet
原声例句
BBC 听力 2012年12月合集
中高级英语短文
Warming above this point increases the risk of triggering major tipping points, including the death of coral reefs and the melting of polar ice sheets, which will add to sea level rise, devastating coastal communities.
全球变暖超过 1.5 度会增加多个重要临界点被触发的风险，包括珊瑚礁死亡和极地冰原融化，这会令海平面升高，给海岸居民带来毁灭性后果。
英语百科
Polar ice cap
（重定向自Polar ice sheet）
A polar ice cap or polar cap is a high-latitude region of a planet, dwarf planet, or natural satellite that is covered in ice.
There are no requirements with respect to size or composition for a body of ice to be termed a polar ice cap, nor any geological requirement for it to be over land; only that it must be a body of solid phase matter in the polar region. This causes the term "polar ice cap" to be something of a misnomer, as the term ice cap itself is applied more narrowly to bodies that are over land, and cover less than 50,000 km²: larger bodies are referred to as ice sheets.
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