leave alone不理, 不管〔惹〕, 不烦扰, 不干涉
例句：She wants to think things out quietly, so we had better leave her alone.
她要安静地考虑一下, 最好别打扰她。
2. Baqui says treating the umbilical cord stump with chlorhexidine antiseptic is a safe and inexpensive strategy that could put a big dent in infant mortality rates, especially among the 60 million or so babies who are born at home each year.
treat with对待; 用防护措施处理某物
例句：New timber should be treated with a preservative.
新采的圆木应进行防腐处理。
put in使处于某种状态
例句：The surprise attack put me in a fix.
这次突然袭击使我处于困境。
3. It has the potential to avert about half a million deaths globally [each year], so I think it's something simple and we should just go ahead and implement.
go ahead进行，进展；继续(做某事)
例句：After the rain stopped, the men went ahead with their work of digging up the street.
雨停后，他们继续在街上挖掘。
