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A late 20th century trend in typing, primarily used with devices with small keyboards (such as PDA's and Smartphones), is thumbing or thumb typing. This can be accomplished using one or both thumbs.
20世纪末期出现了一种新的打字方式，拇指打字，主要用于掌上电脑和智能手机等键盘较小的设备。你可以用单手或者双手的拇指来完成打字。
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