易混淆的单词： NestsNESTS

Some of us might have tried to construct nests at summer camps .

我们中的有些人也许尝试过在夏令营时建窝。

Scientists had also observed them using tools , building complex nests and exhibiting long-term memories .

科学家们也观察到它们会使用工具，修筑结构复杂的窝，还表现出长期的记忆力。

New study says birds learn how to build nests

新研究说鸟类的筑巢本领是后天学来的

As they groom themselves , the tears-and the pheromone-get spread around their bodies and nests .

随着他们刷洗全身，眼泪还有信息素就会散布到它们的全身和窝里。

So the researchers swapped around the eggs in eight nests , while leaving another seven nests untouched to serve as a control .

因此，研究人员互换了八个窝的蛋，而另外7个巢原封不动，并且把他们相互作为对照。