Some of the details are nice, such as the work of scientists trying to create enzymes to do the difficult job of breaking cellulose down to make ethanol.
This is a difficult job--don't rush me.
Zuma, a Zulu former herdboy and polygamist (soon to acquire a fourth wife), has an increasingly difficult job.
It's a difficult job to round up so many sheep.
Some people tackle the difficult jobs first.
Tang Weimin, the project manager, said: "We are not adding or removing anything. We are keeping the original features intact, even though it makes it a much more difficult job.
The most difficult job is how to be a person.
And college students, like this woman from California, are bracing for a very difficult job market after graduation.
This is a very difficult job. Do you think that you can do it?
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