Linchpin

['lɪn(t)ʃpɪn] or ['lɪntʃpɪn]

解释:

(noun.) pin inserted through an axletree to hold a wheel on.

克林顿编辑--From WordNet

解释:

(n.) A pin used to prevent the wheel of a vehicle from sliding off the axletree.

埃维塔校对

解释:

n. a pin used to keep the wheel of a carriage on the axle-tree.

编辑:马丁