Some take more work. Others take almost no work but may require waiting up to a year.

VOA: special.2009.06.23

get back to the initial point is going to require some input from outside, like heat or extra work or extra heat or something because you've done an irreversible process.

如果要逆转它,回到初始点，就需要外界的投入，比如额外的功，额外的热量等等,因为你进行了一个不可逆过程。

麻省理工公开课 - 热力学与动力学课程节选

He says hand tools like tilling forks, shovels and thatching rakes require more work than a rotary tiller, but they work well and cost less.

VOA: special.2010.09.28

Beets are a tasty root vegetable that do not require much work to grow.

VOA: special.2009.02.17

Beets do not require much work to grow.

VOA: special.2010.03.02

"It is going to require more work, but I think that we can get something accomplished there and we can lock down loose nuclear weapons that could fall into the hands of terrorists."

VOA: standard.2009.05.19