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
And the marketing of new toys and games.
还有新玩具和新游戏器具的行销。
The fallout will probably infect millions.
辐射尘可能对数百万人造成影响。
While he was eating, I asked him to lend me twenty pounds.
当他吃饭时，我提出向他借20英镑。