VOA慢速英语:马来西亚研究人员用菠萝叶制造无人机

pineapple – n. a large fruit that grows on a tropical tree and that has thick skin, is sweet and juicy

airframes –n. the body or mechanical structure of an aircraft

transforming – v. to change (something) completely and usually in a good way

leaf – n. one of the flat and typically green parts of a plant

fiber – n. a thin thread of natural or artificial material

sensors – n. a device that senses light, heat, sound or motion and provides information about it

role –n. the part someone plays in an activity or job

yield – n. to produce or provide (something, such as a plant or crop)

desperate – n. very sad and upset because of having little or no hope

alternative –n. a choice or possibility