Arctic sea icecap disappears, leaving polar bears homeless and changing the Earth's energy balance dramatically as reflective ice is replaced during summer months by darker sea surface.

北极冰帽会消融，令北极熊无家可归，更令地球能量平衡急剧改变。因为在夏季时，可反射光和热的冰层被颜色更深的海面所代替。

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The team used a model to estimate the surface mass balance of ice and the amount of ice discharged.

研究团队运用一种模型来评估冰层表面物质平衡与冰流量的关系。

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Before 2000, the ice on Antarctica is thought to have been roughly in balance overall, with new snowfall balancing ice lost through surface melt and icebergs.

在2000年前，南极冰川一直被认为处于平衡状态，融化流失的冰会和降雪达到平衡。

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Radiation and turbulent fluxes dominate the surface energy balance.

UNESCO: Dublin Core

In the short term, with the 109th Congress having punted on fiscal 2007 appropriations, spending authorized by the 2005 surface transportation act hangs in the balance.

FORBES: Magazine Article

The youngster showed good pace, and excellent balance on the slippy surface, to latch onto a through-pass and slide the ball under Brian Murphy in the Swansea goal.

BBC: Swansea director of football Brian Flynn