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発掘， はっくつ
1. excavation, exhumation, digging up, unearthing
2. discovery (of a new fact, talent, etc.), finding, unearthing
挖掘、掘墓、挖出、发掘；发现（新事实、新才能等），找到，发掘
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掘り下げる， 掘りさげる， 掘下げる， ほりさげる
1. to dig down
2. to dig into (a matter), to delve into, to probe into, to investigate, to get to the bottom of
向下挖掘；深入探究（某事），深入研究，深入调查，彻查，查明真相