它从外面的空气或下方的地面收集热量，并用此来供应建筑物或其供水所需的热量。
It removes heat from the air outside or the ground below and uses it to supply heat to a building or its water supply.
由此，用植被供水指数确定了各地州的受灾面积，并建立了植被供水指数估计地面干旱指数的遥感方程。
Thus the drought area in different regions could be determined and regression equations to estimate surface drought index by vegetation supply water index were established.
选择这个热水器所要供水的用具附近的位置。这个热水器必须在室内的水平地面上立式安装。
Select a location near the fixture that this water heater will supply. The water heater must be installed indoors and in a vertical position on a level surface.
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