??(2) If the goods do not conform with the contract, the buyer may require delivery of substitute goods only if the lack of conformity constitutes a fundamental breach of contract and a request for substitute goods is made either in conjunction with notice given under article 39 or within a reasonable time thereafter. 如果货物不符合同，买方只有在此种不符合同情形构成根本违反合同时，才可以要求交付替代货物，而且关于替代货物的要求，必须与依照第三十九条发出的通知同时提出，或者在该项通知发出后一段合理时间内提出。
??(3) If the goods do not conform with the contract, the buyer may require the seller to remedy the lack of conformity by repair, unless this is unreasonable having regard to all the circumstances. A request for repair must be made either in conjunction with notice given under article 39 or within a reasonable time thereafter. 如果货物不符合同，买方可以要求卖方通过修理对不符合同之处做出补救，除非他考虑了所有情况之后，认为这样做是不合理的。修理的要求必须与依照第三十九条发出的通知同时提出，或者在该项通知发出后一段合理时间内提出。 ??Article 47
??(1) The buyer may fix an additional period of time of reasonable length for performance by the seller of his obligations. 买方可以规定一段合理时限的额外时间，让卖方履行其义务。
??(2) Unless the buyer has received notice from the seller that he will not perform within the period so fixed, the buyer may not, during that period, resort to any remedy for breach of contract. However, the buyer is not deprived thereby of any right he may have to claim damages for delay in performance. 除非买方收到卖方的通知，声称他将不在所规定的时间内履行义务，买方在这段时间内不得对违反合同采取任何补救办法。但是，买方并不因此丧失他对迟延履行义务可能享有的要求损害赔偿的任何权利。 ??Article 48
??(1) Subject to article 49, the seller may, even after the date for delivery, remedy at his own expense any failure to perform his obligations, if he can do so without unreasonable delay and without causing the buyer unreasonable inconvenience or uncertainty of reimbursement by the seller of expenses advanced by the buyer. However, the buyer retains any right to claim damages as provided for in this Convention. 在第四十九条的条件下，卖方即使在交货日期之后，仍可自付费用，对任何不履行义务做出补救，但这种补救不得造成不合理的迟延，也不得使买方遭受不合理的不便，或无法确定卖方是否将偿付买方预付的费用。但是，买方保留本公约所规定的要求损害赔偿的任何权利。
??(2) If the seller requests the buyer to make known whether he will accept performance and the buyer does not comply with the
request within a reasonable time, the seller may perform within the time indicated in his request. The buyer may not, during that period of time, resort to any remedy which is inconsistent with performance by the seller. 如果卖方要求买方表明他是否接受卖方履行义务，而买方不在一段合理时间内对此一要求做出答复，则卖方可以按其要求中所指明的时间履行义务。买方不得在该段时间内采取与卖方履行义务相抵触的任何补救办法。
??(3) A notice by the seller that he will perform within a specified period of time is assumed to include a request, under the preceding paragraph, that the buyer make known his decision. 卖方表明他将在某一特定时间内履行义务的通知，应视为包括根据上一款规定要买方表明决定的要求在内。
??(4) A request or notice by the seller under paragraph (2) or (3) of this Article is not effective unless received by the buyer. 卖方按照本条第（２）和第（３）款做出的要求或通知，必须在买方收到后，始生效力。 ??Article 49
??(1) The buyer may declare the contract avoided: 买方在以下情况下可以宣告合同无效：
??(a) if the failure by the seller to perform any of his obligations under the contract or this Convention amounts to a fundamental breach of contract; or 卖方不履行其在合同或本公约中的任何义务，
等于根本违反合同；或
??(b) in case of non-delivery, if the seller does not deliver the goods within the additional period of time fixed by the buyer in accordance with paragraph (1) of article 47 or declares that he will not deliver within the period so fixed. 如果发生不交货的情况，卖方不在买方按照第四十七条第（１）款规定的额外时间内交付货物，或卖方声明他将不在所规定的时间内交付货物。
??(2) However, in cases where the seller has delivered the goods, the buyer loses the right to declare the contract avoided unless he does so: 但是，如果卖方已交付货物，买方就丧失宣告合同无效的权利，除非：
??(a) in respect of late delivery, within a reasonable time after he has become aware that delivery has been made; 对于迟延交货，他在知道交货后一段合理时间内这样做；
??(b) in respect of any breach other than late delivery, within a reasonable time: 对于迟延交货以外的任何违反合同事情： (i) after he knew or ought to have known of the breach; 他在已知道或理应知道这种违反合同后一段合理时间内这样做；或 (ii) after the expiration of any additional period of time fixed by the buyer in accordance with paragraph (1) of article 47, or after the seller has declared that he will not perform his obligations within such an additional period; or 他在买方按照第四十七条第（１）款规定的任
何额外时间满期后，或在卖方声明他将不在这一额外时间履行义务后一段合理时间内这样做；或 (iii) after the expiration of any additional period of time indicated by the seller in accordance with paragraph (2) of article 48, or after the buyer has declared that he will not accept performance. 他在卖方按照第四十八条第（２）款指明的任何额外时间满期后，或在买方声明他将不接受卖方履行义务后一段合理时间内这样做 . ??Article 50
??If the goods do not conform with the contract and whether or not the price has already been paid, the buyer may reduce the price in the same proportion as the value that the goods actually delivered had at the time of the delivery bears to the value that conforming goods would have had at that time. However, if the seller remedies any failure to perform his obligations in accordance with article 37 or article 48 or if the buyer refuses to accept performance by the seller in accordance with those Articles, the buyer may not reduce the price. 如果货物不符合同，不论价款是否已付，买方都可以减低价格，减价按实际交付的货物在交货时的价值与符合合同的货物在当时的价值两者之间的比例计算。但是，如果卖方按照第三十七条或第四十八条的规定对任何不履行义务做出补救，或者买方拒绝接受卖方按照该两条规定履行义务，则买方不得减低价格。 ??Article 51