gums/ɡʌm/名词齿龈，牙龈，牙床sore gums牙龈疼痛树胶，树脂fruit/wine gums水果胶姆糖／酒胶糖/ɡʌm/动词用胶粘The labels were already gummed to the envelopes.标签已经粘贴在信封上了。想跟读，去练习
