dastardly

adj.懦弱的；欺善怕恶的

I ask that the Congress declare that since the unprovoked and dastardly attack by Japan on Sunday December7,1941, a state of war has existed between the United States and the Japanese Empire. 我要求国会宣布：由于日本在1941年12月7日星期日对我国无故进行卑鄙的袭击，美国同日本已经处于战争状态。