He was too diffident to express his opinion.
他太不自信，不敢发表自己
。
,露出
态地,踌躇地;
淡;，性急;;;;;;
某境况具有显示矛盾情感;;He was too diffident to express his opinion.
他太不自信，不敢发表自己。
He is diffident about expressing his opinions in the public.
他在公开场合表达自己意感到胆
。
He has a politely diffident manner.
他态度是客气中带有羞。
There was something shamefaced or diffident about the movement, as if the intention were to conceal any idea of stopping until the very last moment.
这人行动有些害羞
者有些胆，好像不到最后一刻都不打算暴露任何要停下来想法。
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