This act discards the principle of the lowest bid winning the tender to ensure Nigerian companies capable of implementing a contract are not losing a tender only because their bids are not the lowest.
放弃了最低价中标的原则，从而保证具有执行合同能力的尼日利亚本土公司不至于因为其不是最低价而没有中标。
The advantage of the interface mechanism is that you can put together a contract quickly without implementing any of the methods.
接口机制的优点是可以将契约快速集中在一起而无须实现任何方法。
public abstract ContractManager getContractManager() must return an instance of a ContractManager implementing the correct contract checking.
public abstract ContractManager getContractManager()必须返回实现了正确的契约检查的 ContractManager的一个实例。
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