好像你沒錯。

http://www.learnersdictionary.com/definition/plumb

³ plumb /?pl?m/ verb

plumbs; plumbed; plumbing

Learner's definition of PLUMB

[+ object]

1 

 

a  literary : to examine (something) in a careful and complete way in order to understand it

• The book plumbs the complexities of human relationships.
• a scientist who spent her life plumbing the minds of criminals
• The play plumbs the depths of human nature.

b  : to experience or reach (something)

• someone who has plumbed the depths of loss/pain [=who has experienced a lot of loss/pain]
• The company's stocks plumbed new depths [=reached their lowest value] this week.