This line shows how many months it would take for the current supply of housing to run out.

这条线显示了目前的住房供应需要几个月的时间才会耗尽。

Once they're asleep, we run a tiny little electric current through their body and that contracts their venom glads.

一旦他们睡着了， 我们就会让微小的电流流过他们的身体，从而收缩他们的毒液。

He took two parallel wires, ran a current through both of them in the same direction, and the wires attracted each other!

他拿了两根平行的线，把它们都转向同一个方向，线就互相吸引了！

After a few more months of experimenting, Oersted figured out that when a current runs through a wire, the magnetic field that it produces surrounds the wire.

经过几个月的试验，奥斯特发现当电流流过电线时，它产生的磁场会围绕着电线。

A guy — and let's face it, it usually is a guy — stands in his shed or garden or kitchen, and performs a simple experiment running an electrical current through a jug or jar of water.

一个人——让我们面对现实吧， 通常是一个人——站在他的棚子、花园或厨房里，做一个简单的实验， 让电流流过一壶或一罐水。

Naturally occurring magnets aren't powerful enough to lift up huge slabs of steel, but wrap an iron core with wires and run a current through and voila, you can create a powerful electromagnet that can lift cars.

自然产生的磁铁不足以举起巨大的钢板，但用电线包裹铁芯并让电流通过， 瞧，你可以制造一个可以举起汽车的强大电磁铁。