You can takea cue from GCC: maintain many sets of environment variables per application and switch from one pool to another depending on the work at-hand.
On the other hand if you takea look at the shadow on the wall beneath the wood roofs, those appear brownish/redish because the light from the wood gets reflected on the wall and tints it that color.
另一方面如果你注意观察在木头屋顶下边的阴影,那里会呈现红褐色,因为木头反弹到墙面的颜色。
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In fact, you can takea cue from GCC: Maintain many sets of environment variables per application and switch from one pool to another depending on the work at-hand.