mouthwash

漱口水

(shùkǒushuǐ )

A: My dentist told me today that I need to use mouthwash every day. It will help with my tooth decay. 

今天,牙医要求我坚持使用漱口水,这样对我的蛀牙有好处。

(jīntiān yáyī yāoqiú wǒ jiānchí shǐyònɡ shùkǒushuǐ,zhèyànɡ duì wǒ de zhùyá yǒu hǎochù.)

B: Then use it. I have always used it. It's quite helpful. 

那你用吧,我一直在用的,很好用。

(nà nǐ yònɡba,wǒ yīzhí zài yònɡde,hěn hǎoyònɡ. )