在48人的研究中，医生使用喷有药物的球囊。在球囊展开时这些药物将直接挤入动脉壁。
Doctors used balloons sprayed with the drug to press the medicine directly against the artery walls of 48 patients as the device was expanded.
比赛者在比赛中是不能使用球车的，如果球员违反了这个规定，应该怎么处罚？
A condition of a competition prohibits the use of golf carts. If a player infringes this condition, what is the penalty?
对于最高的速度，混合的举止用陶瓷的球在使用中。
For highest speeds, hybrid bearings with ceramic balls are in use.
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