He just stood there, tonguetied and grinning sheepishly.
他只是张口结舌地站在那儿, 羞怯地笑着.
《简明英汉词典》
Everybody is tonguetied at the meeting.
会上大家都闷住了.
《现代汉英综合大词典》
She was so nervous when she was introduced to the famous actress, that she was tonguetied.
她被介绍给那位著名的女演员时紧张得讲不出话来.
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