They all bonded while writing graffiti together.

他们在一起涂鸦时相识。

《柯林斯英汉双解大词典》

As long as we've had walls and writing, we've had graffiti.

自从我们有了墙壁和书写以来，我们就有涂鸦。

youdao

Graffiti refers to any form of drawing or writing on public Spaces, usually you will find graffiti scribbled on the walls of buildings, on trains or on buses.

涂鸦是指在公共场所，通常在建筑物的墙壁上，火车或公共汽车涂的画或写的字。

youdao

This colorful style of writing is also called graffiti.

VOA: special.2009.04.08

Graffiti is writing messages on outdoor surfaces.

VOA: special.2009.10.14

New York's recovery certainly started with a clampdown on anti-social behaviour graffiti writing, street drinking, turnstile jumping, and so on.

ECONOMIST: Crime

Different types of music was played at different times of the day and in an area where classical music was played, young people stopped writing graffiti.

BBC: NEWS | UK | Northern Ireland | Classical attempt to curb loitering

According to records obtained by the Miami Herald, Martin had been suspended from school three times: once for writing graffiti on a door, another time for school truancy and the last time due to drug residue being found in his backpack.

CNN: Police: Trayvon Martin's death 'ultimately avoidable'