"motiveless malignity" "unprovoked and dastardly attack"
例句
The sparrow escapes, the swallow flies off, so the motiveless curse will have no effect. 有如麻雀逃走，燕子飞去：无端的咒骂，也一去无踪。
Moreover, players with softball experience showed lower self-determination, higher externalcontrol motivation and more motiveless willingness toward baseball than those without softball experience. 同样地，在自觉能力高的群体中，有垒球经验者也显示出较高的无动机；
an apparently motiveless murder/attack 表面上没有动机的谋杀/袭击
"motiveless malignity";"unprovoked and dastardly attack"- F.D. 注释列句：occurring without motivation or provocation;
motiveless malignity; unprovoked and dastardly attack- F.D.Roosevelt. 无缘无故的敌意；无缘无故的怯懦的攻击-f.;d
