您要找的是不是:
defecate | shit | have a bowel movement ...
in passing
... 乘便 at your convenience 搭便 at one's convenience; in passing 搭便车的旅行者 hitchhiker ...
at one's convenience
... 乘便 at your convenience 搭便 at one's convenience; in passing 搭便车的旅行者 hitchhiker ...
free rider ; free-riding ; hitchhike ; lift
free riding; free-riding; freeriding
The Free-Rider Problem ; Free rider dilemma