What could have caused the crows to caw?
什么能让乌鸦叫的？
As a further precaution, all the crows had been fed beforehand.
作为进一步的预防措施，所有的乌鸦都预先喂过食。
So scientists want to find out much more about how the crows behave in their native habitat, and a team from Exeter and Oxford universities is carrying out research in New Caledonia.
因此，科学家们希望更多地了解乌鸦在它们的自然栖息地是如何活动的，而埃克塞特大学和牛津大学的一个研究小组正在新喀里多尼亚进行研究。
Subsequently, the crows either ignored the object or dropped the tool and pecked at the object—which is very different from using the tool to get access to food.
随后，乌鸦要不就无视了该对象，要不就把工具丢到一边，然后用喙猛啄该对象——这和用工具觅食有很大不同。
At dawn, the crows flew back to their lair.
天亮了，乌鸦飞回了他们的巢穴。
Significantly, the crows tended to use the sticks only to make their first contact with the object.
值得注意的是，乌鸦倾向于仅在初次与对象接触中使用小棍子。
We first discovered the crows on Friday morning.
我们第一次发现乌鸦是在星期五早上。
When the Wolf grows old, the crows ride him.
狼老被鸦欺。
I've been biding time with the crows and sparrows.
我同乌鸦和麻雀一起打发时光。
You don't expect me to know the private history of the crows .
你不会希望我知道乌鸦们的隐秘历史吧。
The farmers tried to fear the crows out of corn by planting several men of straw.
农民们树起了几个稻草人，试图把乌鸦从玉米地里吓跑。
In the gloaming, the crows flew in to gather for the night in a stand of bare oaks.
薄暮时分，鸦群飞向光秃秃的橡树枝条上过夜。
His research team, however, soon learned that the crows weren't easily fooled twice.
然而，他的研究团队很快发现乌鸦不会第二次再轻易上当。
And the fact that, over time, a growing number of the crows reacted to the "dangerous" masks suggests that flock mates learn from each other.
同时事实是，随着时间推移，能够辨识“危险”面具的乌鸦数量在增长，这说明乌鸦群体在互相学习这一信息。
Until they finally graduated and left campus - and glad to get away, I'm sure - came back sometime later, and found the crows still remembered them.
等到他们再次回到学校的时候，竟然发现那些乌鸦还记得他们！
No more of the Crows Crying at Night.
再也听不到黑夜里乌鸦的啼鸣。
The crows caw when moon goes down.
月落乌啼。
The crows sailing overhead perhaps watched me while I took this survey. I wonder what they thought.
我这么观察着的时候，在头顶滑翔的乌鸦们也许正俯视着我。
The crows, by the dozen, were crossing the river, high in the air, and they would come down on the trees and among the fields across the river.
成打的乌鸦正从天上高高地飞越河面，它们会落在河那边的树丛上和田野里。
Scholarship support from the Crows Nest club is an important means of helping children continue their education and build toward a future unshackled by poverty.
乌鸦巢扶轮社所提供的奖学金是帮助儿童继续接受教育，并为一个不受贫穷桎梏的未来做准备的主要工具。
Scholarship support from the Crows Nest club is an important means of helping children continue their education and build toward a future unshackled by poverty.
乌鸦巢扶轮社所提供的奖学金是帮助儿童继续接受教育，并为一个不受贫穷桎梏的未来做准备的主要工具。
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