最后，我到付款台排队时，她赶到了我前面。
Finally I went to the checkout line, but she got in front of me.
这些自动付款台为商店减少了劳力成本，也提高了它们的效率。
These automatic checkout lanes help the stores reduce their labor cost and increase their efficiency.
作为一个类比，请把负载平衡服务器看为超市的 4 个付款台。
Think of load balancing servers as an analogy to four checkout counters in a supermarket.
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