n. 大瀑布;暴雨,洪水;奔流;[医]白内障>> View more sentences for this word.

n. 石弩;弹弓;[军]飞机弹射器;(飞机上的)座椅弹射器>> View more sentences for this word.

adj. 接触反应的;起催化作用的>> View more sentences for this word.