动词短语
中文翻译：打结
同义词：
['tie up', 'knot up', 'tangle up']
例句：
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1. The children were so excited that they could not tac-au-tac their excitement.
孩子们太兴奋了，以至于他们无法把激动的心情扣紧。
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2. The old man was trying to tie his shoelaces with his arthritic hands.
老人试图用他关节炎的手系鞋带。
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3. The storm made it difficult to tac-au-tac the tent together.
暴风雨使得很难把帐篷扣紧在一起。