It's arduous for college graduates to find a suitable job.
可以。不过arduous表示比difficult更难。底下这个名句很好地诠释了二者的区别：
It is difficult to conquer our own passions; it is arduous to control the unruly and contending wills of others.
It is difficult to conquer our own passions; it is arduous to control the unruly and contending wills of others.
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