Business letters are often an arrangement or regarded as evidence of a contract.

书信经常是一种活动安排，也被视为一份合同的契据。

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There is no firm evidence that BAE's American business has yet suffered as a result, but the firm appealed last month against the award of a contract for trucks to an American rival.

尚无有力证据表明BAE的美国业务因调查受到不良影响，但是公司上个月为一宗卡车合同判给美国竞争对手而进行了申诉。

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If a party suspends performance of the contract without conclusive evidence of the other party's inability to perform the contract, it shall be liable for Breach of contract.

当事人一方没有另一方不能履行合同的确切证据，中止履行合同的，应当负违反合同的责任。

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