Poor rotation, low swinging arms and cross-overs are the major causes of shoulder injury.
不好的身体滚动，低摆臂和过中线是造成肩伤的主要原因。
2
The comic book universe has become more extensive, and cross-overs have become more frequently and involved.
漫画宇宙已经变得很广阔了，穿越于各个世界也变得更加频繁。
3
A large number of recent take-overs in Europe, many of them cross-border deals, will keep anti-trust officials at the European Commission busy for months to come.