And cars, buses and trams Move along slowly In big traffic jams.
和小汽车，公共汽车和有轨电车在大的交通堵塞过程中缓慢地向前走。
The separate electrons travel only slowly along the wire, at about one inch a minute, but they all start to move together immediately the electric circuit is complete.
这些的电子仅仅沿着电线作缓慢移动，每分钟约走一英寸左右。然而，只要电路一接通它们便一齐开始行动。
You would press your finger along the edge and move it very, very slowly.
你就会用手指按着书桌边，非常非常缓慢地移动。
You would press your finger along the edge and move it very, very slowly.
你就会用手指按着书桌边，非常非常缓慢地移动。
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