梅子正低头洗着，忽然听到茅屋的门响了一下，她顿时一惊，赶紧看过去。

The plum is lowering the head to wash, suddenly hear the door of grass shed ring for a while, she now a wondered, hurriedly see past.

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他通过冷静处理人质危机顿时使他的批评者们大吃一惊。

He momentarily confounded his critics by his cool handling of the hostage crisis.

《柯林斯英汉双解大词典》