The invention discloses a double-effect ground source heat pump system.

本发明公开了一种双效的地源热泵系统。

youdao

The snow, which blankets the ground in the winter, actually has an insulating effect on the soil beneath it.

冬天覆盖在地面的雪，实际上对下面的土壤有隔热作用。

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This effect is expected to be so small that it is beyond practical experience and ground laboratory measurement.

据预测，这一效应非常小，以至于超越了实践经验和地面的实验室测量手段。

youdao

But the NATO chief said it underlines the solidarity of the 44 ISAF countries and will have a "powerful effect on the ground."

VOA: standard.2009.12.05

Then a friend mentioned the late Alexander Lippisch, a German who discovered wing-in-ground effect.

FORBES: A Wing and a Prayer

But some Scouts and Scout parents say that passing the decision to the local level will have little effect on the ground, because many troops have been ignoring the national policy anyway.

CNN: Boy Scouts reconsidering policy against gay membership

While Palestinians will see no changes on the ground with immediate effect, the symbolism is all-important.

BBC: Palestinians celebrate historic day