I put on my Sunday best for the occasion.

为了这一盛事，我穿上了自己最好的衣服。“这句话有错吗？

When she married, she put on her Sunday best.

她结婚的时候穿的是自己最好的衣服。

They were all decked out in their Sunday best.

他们穿上了节日盛装。

Put on your Sunday best. This is a formal occasion.

穿上你最好的礼服。这是个正式场合。

Dad wore his Sunday best to visit the bank manager.

爸爸穿着他最好的衣服去拜访银行经理。