Ground the water heater by connecting a grounding wire from the electrical service ground terminal to the green grounding screw in the junction box of the water heater.

通过将电气部件上的接地端子连接到热水器接线盒里绿色接地螺丝上，实现热水器的接地。

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If they stop rotating, a rapid and terminal encounter with the ground beckons.

ECONOMIST: Monitor

But in the spirit of commercialism there are now plans to build a subterranean shopping complex and a huge public transit terminal from 30ft below ground level.

BBC: The battle over Ground Zero

British Airways was forced to abandon its plans of moving its entire Heathrow operations to Terminal 5 in just three days in April, after its baggage system ground to a halt, resulting in chaos in the terminal's opening days.

FORBES: Magazine Article