Radiotherapy is a hospital treatment that uses radiation — a kind of strong energy you cannot see — to fight illness, most often cancer. The energy is aimed at the sick cells to kill them or stop them growing. A course can last many days; each visit may be short, but the tiredness can last.

Radiotherapy is a hospital treatment放射治療是一種醫院裡的治療方式， that uses radiation — a kind of strong energy you cannot see用的是輻射——一種你看不見的強力能量—— to fight illness, most often cancer用來對抗疾病，最常見的是癌症。The energy is aimed at the sick cells這股能量會瞄準生病的細胞， to kill them or stop them growing用來殺死它們，或阻止它們繼續生長。A course can last many days一整個療程可能要好幾天； each visit may be short每次回診可能很短， but the tiredness can last但疲勞感可能持續很久。

Though actually, people mix this up with chemotherapy, which uses drugs, not rays, and with a single X-ray photo, which only looks inside you for a moment.

Though actually不過其實， people mix this up with chemotherapy, which uses drugs, not rays大家常常把它跟化療(chemotherapy)搞混——化療用的是藥物，不是射線—— and with a single X-ray photo, which only looks inside you for a moment也會跟單張的 X 光照片搞混，那只是短暫看一下你的身體內部。

Patients often say they are "having radiation"; radiotherapy is the more formal name. The radio- here means rays, not the radio in the kitchen. You are not turned into a glowing piece of metal, though the hospital will still give you rules about skin and rest.

Patients often say they are having radiation病人常說自己在「having radiation」； radiotherapy is the more formal nameradiotherapy 是比較正式的說法。The radio- here means rays這裡的 radio- 指的是射線， not the radio in the kitchen不是廚房裡的收音機。You are not turned into a glowing piece of metal你不會被變成一塊發光的金屬， though the hospital will still give you rules about skin and rest不過醫院還是會給你關於皮膚照護和休息的規定。