Ice is melting worldwide, especially at the Earth's poles. This includes mountain glaciers, ice sheets covering West Antarctica and Greenland, and arctic sea ice.
冰正在在全球溶化，特别是地球两极，包括高山冰川，复盖着西南极洲和格林兰的大冰源，和北极的冰海。
This paper includes two aspects, the research of ice-breaking ways and the propulsion performance of the rivery icebreaker.
在本次论文中主要包括两个方面，即破冰船破冰方式及推进性能的研究。
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