VOA慢速英语:Clinton, Trump are a Study in Contrasts

screening – n. the act of examining people or things in order to decide if they are suitable for a particular purpose

pivot – n. the act of changing the direction of a policy and moving in a different direction

manipulator – n. a person who uses or controls other people in a clever and often unfair or selfish way; a manipulative person

hydro-fracking – n. a method of drawing oil from the Earth using high-pressure water