词从单阙发展为两阙,凡是下阙开始处的句式与上阕开始处不同的，这叫做换头。
大号可换头螺丝起子 large bit driver
备用小气瓶转换头 SPARE AIR ADAPTER
换头喷嘴 nozzle with removable head
转换头 adapter
可换头防静电镊子 Stainless steel tweezers ; anti-static tweezers
高接换头 grafting high and changing head
无反光镜可换镜头相机 Mirrorless Interchangeable-Lens Camera
改头换面 Extreme Makeover ; Transformation
快换接头 quick release coupling ; Quick joint ; quick change coupler ; Quick-connector
可靠替换弹头 RRW
经过多a的果树高接换头实践，在接穗切削、嫁接时间、砧木处理、嫁接方法及接后管理等方面，总结出了一套高接换头新技术。
After years of high scion and head-changing practice, a set of new technique is generalized about the cutting scion, the grafting time, the stock processing and the management after graft and so on.
我出了一头牛换它。
“我应该在这桩交易里得到点什么，”农夫说，“用一只肥鹅换一头猪，真的！”
"I ought to have something into the bargain," said the countryman; "give a fat goose for a pig, indeed!"
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