VOA慢速英语:对抗疟疾的风险取得进展

stall – v. to bring to a standstill

plateau – v. to reach a level, period, or condition of stability or maximum attainment

realistic – adj. able to see things as they really are and to deal with them in a practical way

maximum – adj. the highest number or amount that is possible or allowed — usually singular

assume – v. to think that something is true or probably true without knowing that it is true

commit – v. to say that (someone or something) will definitely do something : to make (someone or something) obligated to do something
step up – phrasal verb to come forward <stepped up to claim responsibility> : to increase, augment, or advance especially by one or more steps <step up production>

insecticide – n. a chemical substance that is used to kill insects

intervention – n. to become involved in something (such as a conflict) in order to have an influence on what happens

trial – n. a test of the quality, value, or usefulness of something

crossroads – n. often used figuratively to refer to a place or time at which a decision must be made