ontheoccasion值此…之际;在那时;在…之际[同近义词]atthattime,atthatpointeg.OntheoccasionoftheNewYear,maymywifeandIextendtoyouandyourwifeoursinceregreetings.值此新年之际,我太太和我谨向您和您的夫人致以真诚的祝贺。Whatyousaidontheoccasionwasnotappropriate.在这种场合你说这样的话是不相宜的。Ontheoccasionofmyfortiethbirthday,myhusbandsurprisedmewithtwoticketsforafivedayCaribbeancruise.在我四十岁生日那天,我丈夫给了我一个惊喜——两张加勒比五日游的票。