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。

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But many people find it a demanding task.

但是许多人发现这是一项艰巨的任务。

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Checking the versions of Dream of the Red Chamber is a demanding task.

参校《红楼梦》是一件相当繁琐的事。

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That task is more complicated than it used to be, and it's not because cooking is an intellectually demanding task.

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"This would have been a most demanding task for security forces anywhere in the world, and we should acknowledge the resolve shown by the Algerians in undertaking it, " Cameron said.

CNN: STORY HIGHLIGHTS

"This would have been a most-demanding task for security forces anywhere in the world, and we should acknowledge the resolve shown by the Algerians in undertaking it, " the British leader said.

CNN: STORY HIGHLIGHTS