plumb
US /plʌm/
UK /plʌm/

1.
2.
深入探讨, 彻底理解
understand or explore (a complex or mysterious subject) in depth
:
•
The documentary attempts to plumb the mysteries of the universe.
这部纪录片试图深入探讨宇宙的奥秘。
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She spent years trying to plumb the depths of human psychology.
她花了数年时间试图深入探究人类心理的深层。
1.
垂直的, 笔直的
exactly vertical or true
:
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The wall was built perfectly plumb.
这堵墙建得非常垂直。
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Make sure the post is plumb before you secure it.
固定之前,请确保柱子是垂直的。