annul的现在完成时怎么写？

The effect of the statute was to annul this covenant.但州法规废除了这一契约.OBJECTIVE To identify the compositions of volatile oil from Youyang Artemisia annul.目的鉴定酉阳青蒿挥发油的化学成分.It has upon it a stain that technology cannot annul or...

annul的近义词/同义词有：cancel, disannul, void, revoke, reverse, quash, avoid, abolish, repeal, nullify, discharge, abjure, recant, retract, withdraw, overrule, recall, invalidate, undo, rescind, back-pedal, countermand, wipe, bl...

annul的音标：annul的英式发音音标为：[ə'nʌl]annul的美式发音音标为：[ə'nʌl]...

annul的一般过去时为：annulled...

annul的现在进行时为：annulling...

vt.宣告无效，取消，使消失，抹去...

annul的第三人称单数（三单）为：annuls...