在最前沿的零售商店里，比如多佛街的维多利亚·贝克汉姆，当你想付款时，你不用站在任何收银机前。
At the most cutting-edge retail stores—Victoria Beckham on Dover Street, for instance—you don't go and stand at any kind of cash register when you decide to pay.
目前的研究前沿主要集中在叠前深度域和弹性波。
The leading research foreland mainly focuses on pre-stack depth domain and elastic wave.
前沿阻力可以由迅捷而有力的前伸和打水来克服，比如前伸和打腿动作能把更大部分的身体前部抬高。
Frontal drag is reduced by thrusting and kicking, which brings the body up higher out of the water.
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