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penetration/
ˌpenɪˈtreɪʃən
/
1.noun[u] [Military]
突破，侵入
2.noun[u]
洞察力，敏锐的观察力
3.noun[c]
穿透；穿过
4.noun[u]
穿透力
5.noun[u]
（尤指枪弹的）穿入深度
6.noun[u]
（指性行为中男子生殖器的）插入