In other new research, a study has found that circumcision does not decrease the risk that H.I.V.positive men will infect women.

VOA: special.2009.07.29

When a particle moves in a circle, it has an acceleration towards the center of this size, v^2 over R.

当一个质点在圆周上运动时,它有一个指向圆心的加速度,v^2 / R

耶鲁公开课 - 基础物理课程节选

We'll get an expression in which there is no t; t has been banished in favor of v.

我们现在得到了一个不含t的表达式,t被v替换掉了

耶鲁公开课 - 基础物理课程节选

Fong has v.c. backing from Vinod Khosla and a lab in Oakland California.

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This trendline, in conjunction with its 20-day counterpart, has helped propel V to a year-to-date gain of nearly 12%.

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