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plumb sth
plumb 此处意为“测量深度”，常用于测量水域或井的深度。
They plumbed the lake to find its deepest point.
他们测量了湖水的深度，以找到最深处。
深入探究；钻研；彻底弄清
plumbs — third person singular of plumb
先理解核心含义，再看它在真实句子里的用法。
深入探究；钻研；彻底弄清
examine or explore something thoroughly
They plumbed the lake to find its deepest point.
他们测量了湖水的深度，以找到最深处。
测量深度；探测
To determine the depth, generally of a liquid; to sound.
连接供水与排水系统
To attach to a water supply and drain.
深入探究；弄清真相
To think about or explore in depth, to get to the bottom of.
使用铅垂线测量或校准
To use a plumb bob as a measuring or aligning tool.
plumb
Base
原形
plumbs
3rd person
第三人称单数
plumbing
-ing
现在分词
plumbed
Past
过去式
plumbed
Past participle
过去分词
This tool plumbs the depth of the well.
这个工具测量井的深度。
They plumbed the ocean floor with sonar.
他们用声纳探测了海底。
She has plumbed the mysteries of the old library.
她彻底探究了旧图书馆的奥秘。
作动词时表示‘测量深度’或‘彻底探究’，是规则动词。
The report plumbs the causes of the city's housing crisis.
这份报告深入探究该市住房危机的根源。
Before we decide, we need to plumb the full extent of the problem.
在我们决定之前，需要彻底弄清问题的全部范围。
She spent weeks plumbing the archives for clues about her family history.
她花了几周时间翻遍档案，寻找有关家族史的线索。
plumb 此处意为“测量深度”，常用于测量水域或井的深度。
They plumbed the lake to find its deepest point.
他们测量了湖水的深度，以找到最深处。
这是 plumb 的比喻用法，意为“深入探究、彻底弄清”。
The report plumbs the depths of the political crisis.
这份报告深入探究了这场政治危机的根源。
plumb 在此表示“用铅加重”，后接工具时用 with。
The fisherman plumbed his fishing line with a lead weight.
渔夫用铅坠给钓线加重。
“用铅垂线校准”使物体垂直，常见于建筑或木工语境。
The carpenter plumbed the doorframe with a plumb line.
木匠用铅垂线校准门框，使其垂直。
Not this
The scientists used sonar to plum the ocean floor.
Use this
The scientists used sonar to plumb the ocean floor.
plum 是名词，意为“李子”；表示“探测（深度）”的动词应写作 plumb，b 不发音但拼写时不能省略。
Not this
The detective plumbed into the mystery.
Use this
The detective plumbed the mystery.
表示“深入探究”的 plumb 是及物动词，宾语应直接跟在后面，不需要介词 into；中文的“探究…”在英语中把探究对象直接作宾语即可。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
深入探究；彻底弄清
The novel plumbs the depths of human emotion.
这部小说深入探究了人类情感的深处。
铅垂线；垂直参考线
Use a plumb line to check that the wall is vertical.
用铅垂线检查墙壁是否垂直。
完全垂直的
Make sure the posts are perfectly plumb before pouring the concrete.
浇筑混凝土之前，要确保立柱完全垂直。
测量海底深度
The research vessel is designed to plumb the ocean floor.
这艘科考船用于测量海底深度。
深入探究…的深处；陷入…的深渊
The novel plumbs the depths of human despair.
这部小说深入探究了人类绝望的深渊。
不垂直的；倾斜的
The old doorframe is out of plumb by about an inch.
这个旧门框大约倾斜了一英寸。
完全疯狂的；彻底疯的
You have to be plumb crazy to run a marathon in this heat.
你得彻底疯了才会在大热天跑马拉松。
我要在我民以色列中设下准绳。
To understand a poem, you must plumb the layers of its meaning.
要理解一首诗，你必须深挖它的意义层次。
Use plumbs naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
plumb的b不发音，像铅锤plumb入水；想象铅锤线垂直探入深处，plumb the depths就是追根究底。
语域：formal 常见场景：academic writing、literary criticism、serious journalism 作动词表示“深入探究、彻底弄清”时，通常用于正式书面语境，常见搭配 plumb the depths of something，多见于文学、学术或严肃新闻中；日常口语较少使用，口语中更常说 explore thoroughly 或 get to the bottom of。
dumb, thumb, numb, crumb, sum and plum rhyme with plumb /plʌm/. In plumb, dumb, thumb, numb and crumb the final b is silent; plum is a homophone of plumb. Beware the lookalike plume /pluːm/, which does not rhyme.
Dictionary facts from ECDICT, WIKTIONARY.