Most of the mountain glaciers in the Northern Hemisphere are retreating recently because of the negative mass balance, reflecting the warm tendency of the climate change.
近期北半球大多数山地冰川的物质平衡为负，冰川普遍退缩，表明北半球气候暖化的趋势。
The problems of negative mass and inertial origin have also been discussed.
文中还讨论负质量问题和惯性的起源问题。
The problems of negative mass and inertial origin have also been discussed.
文中还讨论负质量问题和惯性的起源问题。
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