A temporary ban giving odd numbered cars off the road on even days, and even numbered cars off the road on odd days, an attempt to target a toxic problem, pollution.

新德里出台临时规定，实行单双号制度，以此来解决空气污染。

This moving target problem can mostly be solved by installing a pressure balancing valve, which will turn down the hot water if the cold suddenly slows down or disappears.

这个移动目标问题大多可以通过安装压力平衡阀来解决，如果冷量突然减慢或消失， 它会降低热水量。