The parrots were given the intellectually demanding task of pulling a snack on a string up to their beaks, using a co-ordinated combination of claws and beak.
鹦鹉们被分派了一项对智力要求很高的任务，它们要协调爪子和喙，将一份拴在绳子上的零食拉到它们的喙上。
2
Finally, you can pass a combination of a string and a node-set as parameters.
最后，您可以将字符串和节点集的组合作为参数来传递。
3
It does not even matter whether the search string is "PARIS" or "PARIS" or any other combination of upper and lower case.