例如身为牙医师的扶轮社员义务为这些小朋友服务，教导他们保持口腔卫生。

For instance, Rotarian dentists volunteer their services to the youngsters and teach them oral hygiene.

youdao

例如身为牙医师的扶轮社员义务为这些小朋友服务，教导他们保持口腔卫生。

For instance, Rotarian dentists volunteer their services to the youngsters and teach them oral hygiene.

youdao