weak or absent surveillance and monitoring systems;

监测和监督系统薄弱或缺乏；

youdao

But in general, such networks are either weak, or absent.

但是通常来说，这种网络要么薄弱要么缺失。

youdao

Conversely, it will be reduced or absent where they do not.

而反之，则会减弱或消失。

youdao

All around us we see the effects of poor or absent parenting negatively affecting society.

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Much of the time Roger looks either haunted or absent, not a black hole but a gray one.

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In President Obama's and Romney's cases, fathers -- present or absent -- are a large part of that cloth.

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