They are training to be doctors, back again.

她们又回来接受医生的培训。

Potter's knife was sticking out of the doctor's back.

波特的刀还插在医生的背上。

Muff fell to the ground, and at the same moment the knife in Injun Joe's hand went into the doctor's back.

莫夫倒在了地上， 与此同时，印第安·乔手中的刀刺入了医生的后背。

I could not guess the use that either would be of, then. However, I went, through wind and rain, and brought one, the doctor, back with me; the other said he would come in the morning.

当时我猜不透请这两个人来有什么用。可是我还是冒着风雨去了，带回来个医生，另一个说他明天早上来。