People can also do double duty.

人们也可以双管齐下。

Now, if something does double duty is serves two purposes.

现在，如果某物有双重职责，就是有两个目的。

Any device can be smart that is connected to the internet or they can do double duty.

任何连接到互联网的设备都可以是智能的，或者它们可以做双重任务。

So, ecologically, one species did double duty.

因此，从生态学角度来说，一个物种承担着双重职责。

The expression " to do double duty" means to use something in two different ways.

“履行双重职责”一词意味着以两种不同的方式使用某些东西。

She planned meals for an entire week and each ingredient did double duty.

她计划了一整周的膳食，每种食材都有双重作用。

She wouldn't accept help, says Totenberg. She was doing double duty, caring for her dying husband and being a Supreme Court Justice.

“她不会接受帮助，”托滕伯格说。“她身兼两职，既要照顾垂死的丈夫，又要担任最高法院法官。”

Paresh's mother made each ingredient that she bought from the store " do double duty" (duty).

Paresh 的母亲让她从商店购买的每一种食材都“履行双重职责”（职责）。

So for me this is doing double duty as my paring knife and my little veg prep knife.

所以对我来说，这既是我的削皮刀又是我的小蔬菜准备刀。

And now new research finds that the visual cortex is constantly doing double duty—it has a role in processing not just sight, but sound.

而现在一项新的研究发现, 视觉皮层一直不间断地在负责双重功能—它但可以处理视觉图像还能负责声音部分。

Some plants pump out smelly chemicals to keep insects away. But others do double duty. They pump out perfumes designed to attract different insects who are natural enemies to the attackers.

一些植物排出有臭味的化学物质来驱赶昆虫。但其他一些植物却承担着双重职责。它们释放香气来吸引不同的昆虫，这些昆虫是攻击者的天敌。

Called Park Strip by the locals, it was built into the original city plans back in 1917. Used originally as a firebreak to protect the town in wildfire season, the park also did double duty as the city's first airstrip.

它被当地人称为公园地带，早在 1917 年就被纳入了最初的城市规划。该公园最初用作防火带以在野火季节保护城镇，同时作为该市的第一个简易机场还承担着双重职责。