You could read issue 1 of Astonishing X-Men on your Mac at work, purchase the second issue with your iPhone on the train ride home, and then read it comfortably in bed with your iPad.

用户可以在工作时用Mac机阅读x战警第一期，用iPhone在回家的路上购买第二期，回到家后躺在床上用iPad阅读。

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Kinematic analysis by using base vector method for the swing linkage of X type train is presented in this paper.

用基底矢量法对X型列车的摆式机构进行了运动分析。

youdao

Barron hopes that the 600-passenger X Train will make its first trip by NYE 2013, but there are still logistical hurdles to overcome in the in the next year.

FORBES: The $100 Million 'X Train' Will Be A Party From L.A. To Vegas