How often do I change my toothbrush
牙刷───toothbrush;更换───replace
The toothbrush gently removes plaque without damaging the gums or causing bleeding.───牙刷轻轻地刷去齿菌斑，没有伤及牙床或引起出血。
When you travel, don't forget to pack your toothbrush.───当你要去旅游时，别忘了带你的牙刷。
How do you choose your toothbrush?───你是如何选择你的牙刷的？
The company is promoting its new sort of toothbrush on television.───该公司正在电视上推销他们的新牙刷。
The toothbrush is preferably made of small size and of lightweight so as to be readily portable for use away from the home.───牙刷优选地制成为小尺寸和轻重量的牙刷以容易地用于离家的便携式使用。
The other things I took were shampoo and a toothbrush, because I needed them, and I took some of his underpants and some of his wife's.───我取走的其他东西是洗发香波和一把牙刷，因为我需要它们，我还取走了他和他妻子的一些内衣。
She packed a fresh set of underwear and her toothbrush.