缺乏...时
当...不在时

In the absence of proof, the police could not take action against him.
没有证据，警察无法对他采取行动。

leave of absence absence of mind absence in the cause of in the likeness of in the eyes of in the character of in the quality of in the form of in the roll of in the face of in the absence of... in the absence of different races of the fungus by the absence of absence of the interventricular septum congenital absence of the skin congenital absence of the breasts and nipples the presence or absence of anthocyanin pigments congenital absence of the vas deferentia thrombocytopenia(with)absence(of the)radius in the shape of in the front of... in the event of...