| 单词 | natural defence | 
| 释义 | natural defence The monastery was surrounded by swamps that made a natural defence against attackers.  Times, Sunday Times  Scientists believe these lucky people are producing natural repellents in their body odour - almost as if the body has a natural defence against mosquitoes.  The Sun  As an invasive device that bypasses the body's natural defence system, the catheter carries a clear infection risk.  Times, Sunday Times  Researchers believe they may interfere with our bodies' natural defence mechanisms.  The Sun  The findings indicate that a natural defence against global warming may be breaking down, meaning that future emissions could result in a faster rise in global temperatures.  Times, Sunday Times   | 
	
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