A biomarker is a chemical in your body that doctors can measure to learn something medical. It might show that you already have an illness, that you are more likely to get one, or that a treatment is working — or not. It is often read from blood, sometimes from urine, spit, or a small piece of tissue. Picture a number on a lab report that is not the illness itself, but a sign that points to it.

A biomarker is a chemical in your body that doctors can measure to learn something medicalbiomarker 是身體裡的一種化學物質，醫生可以測量它來了解一些醫學上的訊息。It might show that you already have an illness它可能顯示你已經有某種疾病, that you are more likely to get one或是你比較容易得到某種疾病, or that a treatment is working — or not或是某種治療有沒有效。It is often read from blood它通常是從血液裡測出來的, sometimes from urine, spit, or a small piece of tissue有時候是從尿液、唾液，或一小塊組織。Picture a number on a lab report that is not the illness itself想像檢驗報告上的一個數字，它不是疾病本身, but a sign that points to it而是指向疾病的一個訊號。

Cancer teams watch certain proteins. Heart doctors watch other chemicals after a scare.

Cancer teams watch certain proteins癌症團隊會盯著特定的蛋白質。Heart doctors watch other chemicals after a scare心臟科醫生在患者出狀況後，會盯著其他的化學物質。

The word is formal and belongs to hospitals and research papers; in a clinic people more often just name the test. Though actually scientists also stretch biomarker to any measurable sign of a living state, even outside medicine, but the meaning you will meet first is this one: a chemical clue inside a person.

The word is formal and belongs to hospitals and research papers這個字很正式，屬於醫院和研究論文；in a clinic people more often just name the test在診所裡，大家更常直接講檢驗的名字。Though actually scientists also stretch biomarker to any measurable sign of a living state, even outside medicine不過其實科學家也會把 biomarker 延伸用來指任何可測量的生命狀態指標，甚至用在醫學以外的地方, but the meaning you will meet first is this one但你最先會遇到的意思還是這一個：a chemical clue inside a person一個人體內的化學線索。