An oncologist is a doctor whose work is cancer. They look at tumours, try to find out what kind of cancer a person has, and help choose the treatment — medicine, strong-ray treatment, or work with a surgeon.

An oncologist一位 oncologist is a doctor whose work is cancer是專門處理癌症的醫生 They look at tumours他們會檢查腫瘤 try to find out what kind of cancer a person has設法找出病人得的是哪一種癌 and help choose the treatment並協助選擇治療方式 medicine, strong-ray treatment, or work with a surgeon可能是用藥、放射線治療，或和外科醫師一起處理

In everyday talk people say “cancer doctor.” Oncologist is the hospital word, and it sounds more formal. You meet this doctor in the cancer part of a hospital, not in a normal clinic.

In everyday talk日常說話時 people say "cancer doctor."大家會說「癌症醫生」 Oncologist is the hospital word oncologist 是醫院裡用的說法 and it sounds more formal聽起來比較正式 You meet this doctor你會 in the cancer part of a hospital在醫院的癌症相關科別遇到這種醫生 not in a normal clinic而不是在一般門診

Though actually, one oncologist does not do every kind of cancer work: some look after cancers in the blood, some look after a lump you can point to, some work mainly with children.

Though actually不過其實 one oncologist does not do every kind of cancer work一位 oncologist 不是什麼癌症都處理 some look after cancers in the blood有的專攻血液方面的癌症 some look after a lump you can point to有的專攻摸得到的腫塊 some work mainly with children有的主要看兒童病人

The science they work in is oncology — that is the part of medical science that deals with cancer and tumours. The -ist at the end is what turns the field into the person. The doctor and the science are different words.

The science they work in他們所屬的那門學科 is oncology叫做 oncology that is the part of medical science that deals with cancer and tumours也就是醫學裡專門研究癌症和腫瘤的領域 The -ist at the end字尾的 -ist is what turns the field into the person就是把這門學科變成「做這件事的人」的部分 The doctor and the science醫生和這門學科 are different words是兩個不同的字