英语翻译An acceptance of an offer becomes effective at the momen

英语翻译
An acceptance of an offer becomes effective at the moment the indication of assent reaches the offeror.An acceptance is not effective if the indication of assent does not reach the offeror within the time he has fixed or,if no time is fixed,within a reasonable time,due account being taken of the circumstances of the transaction,including the rapidity of the means of communication employed by the offeror.An oral offer must be accepted immediately unless the circumstances indicate otherwise.
However,if,by virtue of the offer or as a result of practices which the parties have established between themselves or of usage,the offeree may indicate assent by performing an act,such as one relating to the dispatch of the goods or payment of the price,without notice to the offeror,the acceptance is effective at the moment the act is performed,provided that the act is performed within the period of time laid down in the preceding paragraph.An acceptance may be withdrawn if the withdrawal reaches the offeror before or at the same time as the acceptance would have become effective.