primary star

When a fast ball lands short of you, you have to play back. As a companion star orbits its primary, it alternately approaches and recedes from the Earth.

当一个快球靠近你着地时，你得后退一步击球。当伴星围绕着主星运转时，它交替地朝着地球或背离地球运转。

There is a single contender: Donald J. Trump, the property tycoon, reality TV star and-after a successful primary campaign that upended American politics this spring-the man poised to take the nomination.

只有一位竞争者：地产大亨、电视真人秀明星唐纳德·J·特朗普（Donald J.Trump），他在今年春季颠覆了美国政治的初选中成功胜出，对成为提名人有充分的准备。

As a companion star orbits its primary , it alternately approaches and recedes from the Earth.

当伴星围绕着主星运转时, 它交替地朝着地球或背离地球运转.

Face or play up to primary star candidates: Clinton, Giuliani, Obama, Edwards, Romney, Thompson.

面对或扮演六名一流的明星候选人: 克林顿, 朱利安尼, 奥巴马, 爱德华兹, 罗姆尼, 汤姆森.