plumb

这位历史学家花了几十年试图探究触发战争的那张复杂的联盟网络。

The historian spent decades attempting to ___plumb the complex web of alliances that triggered the war.

科考船使用先进声纳探测了海沟中一段此前从未被探索的区域。

The research vessel used advanced sonar to ___plumb a previously unexplored section of the trench.

治疗师温和地鼓励她去探究那些被她长久压抑的童年记忆。

The therapist gently encouraged her to ___plumb the childhood memories she had long suppressed.