Objective Comparison the surgery effect of ha implantation at period I in half ball scleral flap and petal like scleral flap.

目的比较半球形巩膜瓣和花瓣样巩膜瓣羟基磷灰石(HA)眼座一期植入的手术效果。

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One time, two guys cut the ball in half.

有一次，两个家伙把球切成两半。

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In fact, the pair thinks about half of all ball lightning reports are actually tricks of the mind induced by magnetism.

事实上，这对夫妻，认为几乎全部报道过的球状闪电中的一半竟然是磁性在人的心目中的所构成的骗局。

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Once play began Pietersen was his usual free-scoring self firing a 53-ball half-century inside the opening hour.

BBC: England draw with West Indies A

There are unbroken ones, like bubbles or boils, small ones, ones as big as half a soccer ball.

NEWYORKER: Stone Mattress

Mike Blair sensed where the space was and the scrum-half zipped the ball right where Cairns was waiting to race over.

BBC: Blues 18-17 Edinburgh