局部履行 meaning in English

part performance

2 a party who has performed the contract either wholly or in part may claim restitution from the other party of whatever the first party has supplied or paid under the contract . if both parties are bound to make restitution , they must do so concurrently
已全部或局部履行合同的一方，可以要求另一方归还他按照合同供应的货物或支付的价款，如果双方都须归还，他们必须同时这样做。