To be on the verge of speaking but hold back; to hesitate to speak, often due to unspoken difficulties or reservations.
他几次欲言又止，似乎有什么重要的秘密想告诉我。
He hesitated to speak several times, as if he had some important secret he wanted to tell me.
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To be on the verge of speaking but hold back; to hesitate to speak, often due to unspoken difficulties or reservations.