滚石乐队在商业上是非常精明老道的：他们是第一批意识到歌迷愿意花高价买演唱会门票的乐队之一。
The Stones are wily old businessmen: they were among the first to realise that fans would pay more for concert tickets.
滚花：金属物体表面或边缘上的一系列小峰或凹槽，如指旋螺钉，使更容易握紧。
One of a series of small ridges or grooves on the surface or edge of a metal object, such as a thumbscrew, to aid in gripping.
滚花主要是一种不产生切屑的成型操作。
Knurling. Knurling is mainly a forming operation in which no chips are produced.
滚花主要是一种不产生切屑的成型操作。
Knurling. Knurling is mainly a forming operation in which no chips are produced.
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