Objective To investigate the long term prognosis of patients with X syndrome.
目的探讨心脏x综合征患者远期预后。
How long did it take to complete X-Ray Vision?
花了多长时间才能完成的X射线视觉？
Oh, but how do I know how long it takes to do x 2?
但是，我想知道用第二种方法，做要多长时间呢？
He died long before the search for Planet X resulted in the discovery of Pluto.
他去世很多年之后，X行星才被发现是冥王星。
He died long before the search for Planet X resulted in the discovery of Pluto.
他去世很多年之后，X行星才被发现是冥王星。
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