This painting is their joint work.

这幅画是他们合作的。

《新英汉大辞典》

This painting is their joint work .

这幅画是他们合作的。

youdao

Is the work (will the work be) a joint work?

作品是(或者将是)联合作品吗？

youdao

The president appealed to lawmakers from both parties to work together on health care during his recent address to a joint session of Congress.

VOA: standard.2009.09.28

You can talk about working hard on your joint problem sets, but as long as you go home and you don't work hard, it doesn't help.

你大谈特谈你在多么努力地做家庭作业,但是回家后如果你依旧偷懒,这还是无济于事

耶鲁公开课 - 博弈论课程节选

You discussed in detail your plan -- the joint work that we carry out between our nations.

WHITEHOUSE: President Obama��s Bilateral Meeting with President Nazarbayev of Kazakhstan | The White House

This recognition leads naturally to early and consistent communication among formerly separate parties throughout their joint work.

FORBES: Why Leaders Need to Rethink Teamwork

There will also be joint work on drones, mine counter-measures and satellite communications.

BBC: Cameron and Sarkozy hail UK-France defence treaties