toothpaste

例句：

1. 1.I brush my teeth twice a day to keep them clean.
   我每天刷牙两次来保持牙齿清洁。
2. 2. She uses toothpaste to freshen her breath.
   她使用牙膏来清新口气。
3. 3. The dentist gave me some toothpaste as a gift.
   牙医给了我一些牙膏作为礼物。