normal position的用法和样例：
例句
- This secured the retina in its proper position for the healing process.
这样是为了确保手术期间视网膜能够处在正常位置。 - This is the normal appearance of the thyroid gland on the anterior trachea of the neck.
这是位于颈部气管前方甲状腺的正常位置。 - If the mass is displaced from its rest position and released, it will oscillate up and down.
质量如果离开它的静止位置后再释放，将作上下振荡。
