bicentennial
adj
happening once in two hundred years; marking a bicentenary 二百年一次的; 二百周年纪念的
a bicentennial anniversary/celebration 二百周年纪念活动[庆典]. bicentennial, n = bicentenary.
🗣️ 情景例句
But it's not going to be easy.
不过这事可不容易。
Don't break the rules.
不要违规。
that if we escape wars, accidents and diseases we shall eventually 'die of old age',