VOA慢速英语:Obama Permits Military Weapons Sales to Vietnam

strict – adj. used to describe a command, rule, etc., that must be obeyed

access to – n. a way of being able to use or get something

conducive to – n. making it easy, possible or likely for something to happen or exist

calculating – adj. carefully thinking about and planning actions for selfish or improper reasons

in one fell swoop – adj. with a single, quick action or effort

jettison – v. to get rid of (something)

leverage – n. influence or power used to achieve a desired result