The smallest unit that supports electron flow in a semiconductor material ; a hole in P-type silicon or a free electron in N-type silicon.

多数载流子-一种载流子，在半导体材料中起支配作用的空穴或电子，例如在N型中是电子。

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Bolt (n. ) metal secured into a drilled hole in the rock as means of protection. Often accompanied by a hanger, an eyelet to which a carabiner can attach.

一种金属器材，通常钉在岩石上作为保护点，上面有洞可以连接钩环。

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The 510-yard par 5 third hole at Fenway Golf Club in Scarsdale, N.

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