sealants
n. [机]密封剂;塑封(sealant 的复数)
例句
What are dental sealants?
什么是牙齿保护胶?
Who should get sealants?
谁应该涂保护胶?
How can I get dental sealants for my children?
我如何为我的孩子获得保护胶?