他用湿布轻轻擦拭，让干燥的泥土变得湿润。

He gently ___moistens the dry soil with a damp cloth.

她在烤蛋糕时，会定期用刷子沾水湿润蛋糕表面以防干裂。

She regularly ___moistens the cake surface with a brush to prevent cracking while baking.