1. 我看他的表情是似懂非懂的,可他却说完全听懂了。
I thought he didn't catch it, although he seemed to have understood, but he said that he had understood completely.

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2. 刚上学时,妈妈常跟我说:“你要好好读书。”那时的我,似懂非懂地点着头。
When I just went to school, mother often said to me: "you must study hard. " At that time, I nodded but I didn't really understand.

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3. 突然,那些经常谈起的家族故事,她从小就听,尽管有点不耐烦但仍然似懂非懂地听着故事,现在像水晶般清晰起来。
Of a sudden, the oft-told family tales to which she had listened since babyhood, listened half-bored, impatient and but partly comprehending, were crystal clear.

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4. 突然,那些经常谈起的家族故事,她从小就听,尽管有点不耐烦但仍然似懂非懂地听着故事,现在像水晶般清晰起来。
Of a sudden, the oft-told family tales to which she had listened since babyhood, listened half-bored, impatient and but partly comprehending, were crystal clear.

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