University students' practical ability has a great deal of difference in the aspects of ability group, grade, gender and discipline specialty.

大学生的实践能力存在差异性，这种差异表现在不同的能力组群、年级、性别及学科专业等方面。

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"The ability to broadcast to our social group means we need never feel alone," he says.

“向我们的社会群体传播信息的能力意味着我们永远不会感到孤独。”他说道。

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Another group of helpless children who were simply rewarded for their success on easier problems did not improve their ability to solve hard math problems.

另一组无助的孩子仅仅因为解决了简单的问题就得到了奖励，这样并没有提高他们解决数学难题的能力。

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Peter Harling, an Iraq specialist at the International Crisis Group in Damascus, countered that al-Qaida has shown a remarkable ability to replace its leaders.

VOA: standard.2010.05.10

By keeping the lower ability group much smaller, the teachers are able to give closer attention to under-achieving boys.

BBC: London teachers' Jamaican lessons

It also added the ability for group owners to approve people before they join a group.

FORBES: Facebook's New "Send" Button For Private Sharing

The programs aim to identify students with high ability, group them together and tailor instruction to their level, but the program has also been criticized as unfairly favoring affluent families and enrolling disproportionate numbers of white and Asian children.

WSJ: New York City Gifted-and-Talented Program's Math Is Questioned