Semicentennial
a. 五十年一度的, 持续半个世纪的\\nn. 五十周年, 五十周年纪念
✅ 同义词
🗣️ 情景例句
Let me see your driver's license.
给我看一下你的驾驶执照。
Thanks for the advice,but this is something I have to figure out myself.
谢谢忠告，但是这必须由我自己解决。
Our climate is not very good,but it's certainly interesting.
虽然我们国家的气候并不很好，但又确实很有意思。