A lesion is damage to a part of the body. It may be on the skin, where you can see a sore or a mark, or it may be inside — in the stomach, the liver, or the brain — where only a doctor with a scan can find it. Illness can cause it, and so can an injury.

A lesion病變 is damage to a part of the body是身體某個部位受到的損傷。It may be on the skin可能長在皮膚上, where you can see a sore or a mark在那裡你可以看到傷口或痕跡, or it may be inside或者也可能在體內—— in the stomach, the liver, or the brain在胃、肝臟或腦部—— where only a doctor with a scan can find it只有醫生用掃描才能發現。Illness can cause it疾病可能造成它, and so can an injury受傷也可能。

Doctors like the word because it is wide: it does not say whether the damage is a cut, a lump, a dying patch of tissue, or something else; it only says this bit is not as it should be.

Doctors like the word醫生喜歡用這個字 because it is wide因為它涵蓋範圍很廣：it does not say它不會說明 whether the damage is a cut, a lump, a dying patch of tissue, or something else那個損傷究竟是傷口、腫塊、壞死的組織，還是別的東西；it only says它只是說 this bit is not as it should be這個部位不太對勁。

Ordinary people more often say wound, cut, sore, or scar when they can see it.

Ordinary people一般人 more often say wound, cut, sore, or scar比較常說wound（傷口）、cut（割傷）、sore（痛處）或scar（疤痕） when they can see it當他們看得見的時候。

You will hear lesion mainly in hospitals, in medical news, and in science. It is a fairly formal, technical noun.

You will hear lesion mainly你主要會 in hospitals, in medical news, and in science在醫院、醫療新聞和科學裡聽到lesion這個字。It is a fairly formal, technical noun它是個相當正式、專業的名詞。

It came into English from Middle English lesioun, from Old French lesion, from Latin laesiō (hurt, harm, injury), from laesus, the past form of laedō, to strike or hurt.

It came into English它進入英文 from Middle English lesioun源自中古英文lesioun, from Old French lesion源自古法文lesion, from Latin laesiō (hurt, harm, injury)源自拉丁文laesiō（傷害、損害）, from laesus, the past form of laedō, to strike or hurt而laesiō又來自laedō（打擊、傷害）的過去式laesus。