前言：很多人可能跟我一樣，明明某些知識或資訊知道怎麼用中文說，但卻不曉得怎麼用英文說。結果在英文對話時張口結舌、啞口無言搞得自己好像很呆、程度很差似的。所以我把一些中文懂但英文不太會講的資訊筆記下來，除了供自己參考，也分享出來給讀者們瞧瞧。希望這些訊息對你有幫助。
Preface: There is some knowledge or information that I can talk about in Chinese (my first language) but not in English. Therefore, as an English learner, I noted some of them and try to share them on my blog. I hope it’s helpful to you, too.
Semidiurnal: twice a day
Diurnal: daily
Biweekly: twice a week or every two weeks
Semiweekly: twice a week
Weekly: once a week
Bimonthly: twice a month or every two months
Triweekly: three times a week or every 3 weeks
Semimonthly: twice a month
Monthly: once a month
Trimonthly: every three months
Quarterly: four times a year
Biannual: twice a year
Semiannual: every six months
Annual: yearly
Perennial: occurring year after year
Biennial: 2 years
Triennial: 3 years
Quadrennial: 4 years
Quinquennial: 5 years
Sexennial: 6 years
Septennial: 7 years
Octennial: 8 years
Novennial: 9 years
Decennial: 10 years
Undecennial: 11 years
Duodecennial: 12 years
Quindecennial: 15 years
Vicennial: 20 years
Tricennial: 30 years
Quadricennial: 40 years
Semicentennial: 50 years
Centennial: 100 years
Sesquicentennial: 150 years
Bicentennial: 200 years
Quadricentennial: 400 years
Quincentennial: 500 years
Millennial: 1000 years
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元毓說 