by a party hereto of a breach of, or a default under, any of the provisions of this Contract, nor the failure of a party on one or more occasions, to enforce any of the provisions of this Contract or to exercise any right or privilege hereunder

• 本合同一方免予追究对本合同任何条款的违反或不履行、或一方一次或多次未执行本合同的任何条款或行使本合同项下的任何权利或特权