absence of

Original mail returned in the absence of the addressee.

收信人不在，原件退回。

The absence of children at Christmas preyed on Liz's mind.

利兹因为圣诞节时孩子们不在而一直心神不宁。

The competition has been thrown wide open by the absence of the world champion.

由于世界冠军缺阵，这场比赛变得胜负难定。

Her absence of mind during driving nearly caused an accident.

她驾车时心不在焉,几乎肇祸.

A complete absence of national border controls is as utopian today as the vision of world government.

在今天，完全取消国家边界控制的观点与建立一个世界政府的想法一样不切实际。

The presence or absence of clouds can have an important impact on heat transfer

有无云层对热量的传递会产生重要的影响。

There is more to good health than the mere absence of disease

身体健康不仅仅指不生病，还包括更多。