No bare feet, please wear proper footwear.

请着合适鞋类，勿打赤脚。

youdao

He watched as she stood in front of the store and read the sign: No Bare Feet.

他看到小女孩站在冰淇淋店门前，阅读说明牌上的内容：不穿鞋禁止入内！

youdao

They were certainly not suitable for mourning; but she had no others, and so she put her bare feet into them and walked behind the humble coffin.

的确，这不是服丧时穿的东西；但是她却没有别的鞋子穿。 所以她就把一双小赤脚伸进去，跟在一个简陋的棺材后面走。

youdao

No bare feet -- It should go without saying that being cooped up on an airplane with others mere inches from you is painful enough with everyone clothed.

CNN: Five things not to do on airplanes

He glanced at her bare feet but made no comment.

NEWYORKER: In Other Rooms, Other Wonders