长针

zhè ge cháng zhēn jiào fēn zhēn

这个长针叫分针。

The longer hand is called minute hand.

yòng yī gēn cháng zhēn qǔ zhǒng liú yàng pǐn

用一根长针取肿瘤样品。

A long needle is used to take a sample of the tumour.