The rhizosphere plays a very important role in plant growth.

What he's saying is a baseless story.

That idea takes root in his mind.

What should I do to find the root number of this equation?

He underwent surgery on the depressor septi nasi.

He is doing a special exercise to strengthen his flexor carpi ulnaris.

He is doing special exercises to strengthen his extensor carpi ulnaris.

The flexor carpi radialis is an important muscle for bending the wrist.

Well then, I'm off.

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'