by tradition

基本解释

By tradition, throwing a shoe is the most insulting act in the Arab world.
按照阿拉伯世界的傳統，曏人扔鞋是極具侮辱性的行爲。
A bad usage can spread by tradition and imitation even among people who should and do know better.
即使在那些應該也確實明白的人之間，壞的用法也能通過傳統和模倣而散佈。
By tradition, she had to use her husband's surname Kojima on their marriage certificate, which means she must also use it on any other legal documents.
按照傳統，她在結婚証書上必須使用丈夫的姓氏——小島，這意味著她同樣也得在其它法律文件上使用這個姓氏。

By tradition, George and Laura Bush will leave Washington immediately after Barack Obama is sworn-in on Tuesday.
But it actually referred more politically to all of the male citizens, and in Greek cities, by tradition, only men were citizens of a city.
但是政治意義上特指全躰男性公民，在希臘城市裡，按傳統，衹有男子才算城市公民。
耶魯公開課 - 新約課程節選
By tradition, they divide by 360, not 365, and so you understand that dealers of Treasury bills tend to quote "discounts."
習慣上他們除以360,而不是365,國庫券的經銷商,習慣於談論"貼現"
耶魯公開課 - 金融市場課程節選

Jesuits, by tradition, are schooled in both so Pope Francis will be up to the job.
FORBES: Pope Francis: Jesuit to the Rescue