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1.The patient needs a retainer disc to align his teeth properly.
患者需要一副保持器盘来正确排列他的牙齿。
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2.The dentist recommended the patient to wear a retainer disc for six months.
牙医建议患者戴保持器盘六个月。
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3. The retainer disc is made of high-quality stainless steel and is designed to hold the teeth in place.
保持器盘由高质量的不锈钢制成，旨在将牙齿固定在位。