knothole是什么意思音标:英 ['nɒthəʊl]美 ['nɒtˌhoʊl]

n. 节孔

n. a hole in a board where a knot came out

knothole的用法和例句：

1.Who wouldn't know an airlock from a knothole.

谁会连节孔和气闸都分不清啊