Bicentennial means the day or year exactly 200 years after an important event — the same idea as bicentenary. Americans use this word more. They use it as an adjective (a bicentennial parade) and as a noun (the bicentennial).

Bicentennial Bicentennial means the day or year exactly 200 years after an important event指的是在一個重要事件剛好兩百年後的那一天或那一年 — the same idea as bicentenary跟bicentenary是同一個意思。Americans use this word more美國人比較常用這個字。They use it as an adjective他們會把它當形容詞用 (a bicentennial parade)（a bicentennial parade兩百週年遊行） and as a noun也當名詞用 (the bicentennial)（the bicentennial兩百週年紀念）。

The big US example many textbooks mention is 1976, two hundred years after 1776. British writing still often prefers bicentenary for the noun.

The big US example many textbooks mention is 1976課本常提到的美國大例子是1976年， two hundred years after 1776也就是1776年之後兩百年。British writing still often prefers bicentenary英式寫作還是比較常用bicentenary for the noun當名詞用。

Though actually, both words are built the same way: bi- (two) plus a “hundred years” piece. If you only remember one Chinese hook, 兩百週年 covers both.

Though actually不過， both words are built the same way這兩個字其實組成方式一樣： bi- (two) plus a "hundred years" piecebi-（二）加上「一百年」的部分。If you only remember one Chinese hook如果只想記一個中文對應詞， 兩百週年 covers both「兩百週年」兩個字都適用。

It is a ceremony-and-history word, not an everyday one. Do not use it for a person’s 200th birthday unless you are talking about a famous birth long ago, or a city, a school, a country.

It is a ceremony-and-history word這是跟慶典、歷史有關的字， not an everyday one不是日常用字。Do not use it for a person's 200th birthday不要拿它來指一個人的兩百歲生日， unless you are talking about a famous birth long ago除非你講的是很久以前某位名人的誕辰， or a city, a school, a country或是一座城市、一間學校、一個國家。