doctor
英 [ˈdɒktə(r)] 美 [ˈdɑːktər]
n.医生;大夫;诊所;博士
v.篡改;伪造;将有害物掺入(食物或饮料)中;阉割(动物)
第三人称单数： doctors；复数： doctors；现在分词： doctoring
过去式： doctored；过去分词： doctored
例句：
The new system expanded the role of family doctors.
新体制扩大了家庭医生的作用。
Doctors still don't understand much about the disease.
医生对这种疾病还不太了解。
Doctors still don't understand much about the disease.
医生对这种疾病还了解不多。