单词：positive hole
[化] 空穴
positive hole的用法和样例：
例句
- The reason is that people born with the heart outside their ribcage do not have a hole in the chest cavity to fill up.原因是，出生时心脏就在胸腔外的病人，其胸腔里没有可容纳心脏的空穴。
- The other way was to knock a bound electron off a neutral atom creating simultaneously an electron and a hole.另一种方法是把束膊电子从中性原子中撞出，同时产生电子和空穴。
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