投射又称外射作用，是指个体将自己不喜欢或不能承受但又是自己具有的冲动、动机、态度和行为转移到他人或周围事物上，认为他人或周围事物也有这样的动机和行为。如“以小人之心度君子之腹”、“我见青山多抚媚，青山见我亦多情”等就是投射作用的写照。
n. projection
这是他制作的和梭标投射器（利用杠杆作用加快长矛速度、增加投射距离的石器时代的一种投射装置）一起使用的长矛。
, holds a bundle of spears that he made for use with an atlatl, a Stone Age throwing device that uses leverage to sharply increase the speed and distance a spear can travel.
目前国内对隐喻研究更多的侧重于它的积极作用；而很少人关注隐喻投射的潜在消极影响。
Researches in the regard of metaphor at home focus more on its positive functions, while few researchers pay attention to the potential negative influences of metaphorical mappings.
穴位针感的这种投射特征可能就是穴位作用具有节段性特征的基础。
Such a projection feature manner may serve as the basis of the, segmental feature in the distribution and effects of acupoints.
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