There's a complete lack of knowledge about obesity.对于肥胖症的知识十分匮乏

lack of:缺乏

He was dismayed at his lack of understanding.

他对自已的无知感到沮丧。

The lack of air in the room make everyone sniffle.

屋子里空气缺乏，使得每个人都频频吸气。

常用短语:

have no lack of不缺乏

We have no lack of talented people.

我们不缺人才。

How did we end up in this situation and how do we fix it?我们该如何结束这一局面，该如何弥补

end up:结束；告终

If you continue to steal you'll end up in prison.

你要是继续行窃终归得进监狱。

a story that television has been drawn to over and over again because it's never gone away.电视节目不断上演的故事因为它始终伴随着我们

draw to:逼近, 接近

The performance is drawing to an end.

演出接近尾声。

常用短语:

draw to a head达到顶点(酝酿成熟)

go away:离开

It made me sad to hear you have to go away.

听到你非走不可，我觉得很伤心。