例句與造句

1. Branches from the posterior spinal arteries form a free anastomosis around the posterior roots of the spinal nerves, and communicate, by means of very tortuous transverse branches, with the vessels of the opposite side.
2. Direct infiltration of the nerve roots is also observed, mostly from the dorsal roots ( the afferent sensory root of the spinal nerve ) than the ventral roots ( the efferent motor root of a spinal nerve ).
3. Passing through the lateral funiculus of the medulla spinalis, they emerge on its surface and unite to form a single trunk, which ascends between the ligamentum denticulatum and the posterior roots of the spinal nerves; enters the skull through the foramen magnum, and is then directed to the jugular foramen, through which it passes, lying in the same sheath of dura mater as the vagus, but separated from it by a fold of the arachnoid.
4. It's difficult to find root of the spinal nerve in a sentence. 用root of the spinal nerve造句挺難的