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gum的现在进行时为：gumming...
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Spit out that gum and pay attention.把那块口香糖吐出来，注意听。Extraction Method Galbanum gum is collected incisions on the roots of the plant.白松香胶采集于其植株的根部.The gum was three reals.这口香糖是三雷亚尔.Kookaburra sits on an old gum tree.翠鸟坐在一棵老...
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gum的现在完成时为：gummed...
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n.口香糖，树胶，黏胶，牙龈vt.& vi.胶合，涂以树胶，使…有粘性...
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gum的第三人称单数（三单）为：gums...
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When not removed, plaque causes tooth decay and gum disease.牙斑如果不清除就会导致牙齿蛀蚀和牙龈疾病。I've tried everything from herbal cigarettes to chewing gum.中草药香烟、口香糖之类的我统统都试过了。Deposits of plaque build up between the tooth and the ...
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gum的一般过去时为：gummed...