n.牙床；樹膠；齒齦；粘性物質(zhì)

v.搞砸；用牙床嚼；以樹膠粘合

He has some sore swellings on his gum. 他牙床腫痛。

Heart attack patients usually have gum diseases! 心臟病患者通常患有齒齦疾病。

We can stick these pictures into the book with gum. 我們可用膠水把這幾張畫粘貼在書里。

He likes chewing gum. 他喜歡嚼口香糖。

You'll gum up the jobs if you do it this way. 你這樣做會(huì)把事情搞砸。

It may well gum up the joint. 最好把結(jié)合處粘上。

You can gum this piece of wood onto the wall. 你能把這片木頭粘到墻上去。

His pocket was all gummed up with candy. 他的口袋全被糖粘住了。

gum用作名詞時(shí)意思是“樹膠”“口香糖”,轉(zhuǎn)化成動(dòng)詞時(shí),指“(把某物)黏合起來”或“給…涂膠”。

gum可作及物動(dòng)詞,也可作不及物動(dòng)詞,作及物動(dòng)詞時(shí),跟簡(jiǎn)單賓語(yǔ)。

gum的過去式和過去分詞均為gummed。