Undid is the past tense of . (undo)的过去式
I undid the package and took out the books.
我打开包裹取出书来。
He undid most of the good work of the previous manager.
他把前任经理的大部分功绩都毁掉了。
I undid the bottom two buttons of my yellow and grey shirt.
我解开了我黄灰色相间衬衫最下面的两个钮扣。
And then,when my head was well in the room, I undid the lantern just so much that a single thin ray of light fell upon the vulture eye.
VOA: special.2009.05.16
She took a doubtful step and then undid it To raise herself and look again.
她犹豫地踏出了一步又收了回来,又上去继续往下看。
My cat yesterday actually undid my Yale password last night.
我家"小猫"昨晚把我耶鲁账号的密码给改了
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