Yao is not used in hand, why but active hand hook?

明明就不习惯牵手，为何却主动把手勾？

youdao

He has an iron hook instead of a right hand, and he claws with it.

他用铁钩代替了右手，用它来抓东西。

youdao

Rather than hand code method calls to surround each application call to an annotated interface methods, another option is to define a Hook to register with the annotated interface.

现在不需要手动编写方法调用，以便将每个应用程序调用围绕一个带注释的接口方法，而是采用另一种方法，定义一个Hook以注册到带注释的接口。

youdao

There was a scare for Celtic when 'keeper Rab Douglas dropped a corner kick but Stanislav Varga was on hand to hook the ball to safety.

BBC: Motherwell 2-1 Celtic

Right from the start, Chelsea looked off key and when skipper John Terry failed to head away Paul Konchesky's cross, Gera was on hand to hook the ball in after Bobby Zamora had nodded it his way.

BBC: Didier Drogba

Nikki Walker and James Hook were on hand to feed Parker and two percussive hand-offs later the Wales centre was over for the first try of the night.

BBC: Gloucester 26-18 Ospreys