我们在为Oral - B做一个项目，设计的内容是一个牙刷，它是第一个共同模具浇注的牙刷，软的牙刷手柄专为儿童设计。
We worked on a project which was for Oral b, this is a toothbrush - it was the first of the co-moulded toothbrushes, the squishy handled toothbrushes designed to make toothbrushing better for kids.
我的小儿子现在有了十二颗牙了，所以我给他买了第一把儿童牙刷。
My little son has twelve teeth now, so I will buy him his first baby toothbrush.
目的：观察儿童使用声波震动牙刷清洁牙及控制菌斑的效果。
PURPOSE: to evaluate the efficacy of using sonic electric toothbrush to clean the teeth and control dental plaque in children.
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