Material Breach of Contract重大违约;重大的违约
a material breach实质违约
material breach detail重大违约
From the point of view of law of treaties, material breach will constitute the ground oftermination or suspension of the performance of the treaty.
从条约法的角度讲,如果有重大违约情事存在,则构成终止或停止履行条约的原因。
参考来源 - 论国际义务的性质