Time like hardly using up dentifrice,as long as you crush it ,it must have a little!

时间就像快用完的牙膏，只要你去挤，总还有一点。

To estimate the clinical effect of the dentifrice with xylitol in control of plaque.

评价木糖醇牙膏在抑制菌斑生成的临床效果。