A nodule is a small round raised part, like a tiny knot sitting on or just under a surface.

A nodule is一個nodule是 a small round raised part一個小小、圓圓、凸起的部分，like就像 a tiny knot一個小小的結 sitting on or just under a surface長在表面上、或表面下方一點點的地方。

Doctors use it for a little lump in the skin, the thyroid, the lung, and so on — often something you can feel with a finger, and usually not huge. Biologists use it for the small round swellings on the roots of plants such as beans, which help the plant take in nitrogen. Geologists use it for little rounded lumps in rock.

Doctors醫生 use it for會用這個詞指 a little lump一個小小的腫塊 in the skin, the thyroid, the lung, and so on長在皮膚、甲狀腺、肺等等的地方——often something you can feel with a finger通常是用手指摸得到的東西，and usually not huge而且通常不會很大。Biologists生物學家 use it for會用這個詞指 the small round swellings那些小小圓圓的腫起 on the roots of plants such as beans長在像豆子這類植物的根部上，which help the plant take in nitrogen能幫助植物吸收氮。Geologists地質學家 use it for會用這個詞指 little rounded lumps in rock岩石裡小小圓圓的塊狀物。

It is a calm, technical word. It does not by itself mean that something is dangerous; a doctor may still want to check a nodule, because some lumps need a closer look.

It is這是 a calm, technical word一個平靜、專業的詞。It does not by itself mean它本身不代表 that something is dangerous有什麼東西是危險的；a doctor may still want to check醫生還是可能會想檢查 a nodule一個nodule，because some lumps need a closer look因為有些腫塊需要進一步檢查。

In everyday talk, people more often say lump or bump.

In everyday talk在日常對話裡，people更常 more often say會說 lump or bumplump或bump（腫塊或凸起）。