A gland is a small organ in the body that makes a substance the body needs and then sends it out.

A glandgland is a small organ in the body是身體裡的一個小器官 that makes a substance the body needs and then sends it out會製造身體需要的物質，然後把它送出去.

Sweat glands in the skin make sweat. Glands in the mouth make saliva, the water that helps you swallow. Other glands make hormones, the chemical messages that travel in the blood and tell the body what to do.

Sweat glands in the skin make sweat皮膚裡的汗腺（sweat glands）會分泌汗水. Glands in the mouth make saliva嘴巴裡的gland會分泌唾液, the water that helps you swallow也就是幫助你吞嚥的那種水. Other glands make hormones其他gland會分泌荷爾蒙, the chemical messages that travel in the blood and tell the body what to do也就是在血液裡跑來跑去、告訴身體該做什麼的化學訊息.

You usually cannot see a gland from the outside, though a doctor may feel one in the neck when it is swollen. In school and in clinics this is the normal meaning, and it is a fairly formal, science-y word — at home people more often name the stuff (sweat, spit) than the gland itself.

You usually cannot see a gland from the outside你通常沒辦法從外面看到gland, though a doctor may feel one in the neck when it is swollen不過腫起來的時候醫生可能可以在脖子上摸到. In school and in clinics this is the normal meaning在學校和診所裡這是正常的意思, and it is a fairly formal, science-y word而且是個相當正式、有科學味的詞 — at home people more often name the stuff (sweat, spit) than the gland itself在家裡大家更常直接講那個東西的名字（汗、口水），而不是講gland本身.

Though actually, mechanics also use gland for a tight seal on a pipe or machine; that is a different history, from an old word for a clamp, not from the body. In this lesson we mean the body part.

Though actually不過其實, mechanics also use gland for a tight seal on a pipe or machine技工也會把管子或機器上的緊密密封件叫做gland; that is a different history這是不同的來歷, from an old word for a clamp, not from the body來自一個表示夾具的舊字，跟身體無關. In this lesson we mean the body part這一課我們講的是身體的部位.