VOA慢速英语:Release Details About Drone Strikes, Groups Say

drone – n. unmanned aircraft or ship guided by remote control

transparency – n. the state of being transparent

combatant – n. person or nation engaged in fighting during war

quantify – v. calculate the quantity of something

data – n. facts or information

forgo – v. to give up

conventional – adj. used and accepted by most people

accountable – adj. required to explain actions or decisions

ensure – v. make certain that something will happen