牙刷或者电动牙刷刷头应每三~四个月更换一次——如果未到时间，刷毛已经磨损或是变形，那么请及时更换。
Invest in a new toothbrush or a replacement head for your electric or battery-operated toothbrush every three to four months - or sooner if the bristles become frayed.
而且出于卫生需要，索纳斯二代变频电动牙刷的刷头都自带一个透明刷头盖，用于日常的防尘！
But for health needs, the brush head Souness two generation of inverter electric toothbrush comes with a transparent brush for daily dust cover!
而内里整个牙刷的零部件（牙刷主体，两个刷头，一个充电器）整齐的分放在包装盒里的每一个细盒里面，有条不紊。
While the inside parts (the whole toothbrush toothbrush body, two brush head, a charger) neatly placed in every box inside the box, everything in good order and well arranged.
牙刷头还包括一个刷毛簇区域，所述刷毛簇区域设置在外周边部分内。
The head also comprises a tuft field positioned within the outer perimeter portion.
较小的嘴，可能需要一个紧凑（小）头牙刷。
Smaller mouths may require a toothbrush with a compact (smaller) head.
较小的嘴，可能需要一个紧凑（小）头牙刷。
Smaller mouths may require a toothbrush with a compact (smaller) head.
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