Drink whenever you feel thirsty during exercise.

　　運動過程中渴了就喝點水。

　　If your child is thirsty for learning, then it is senseless to hold her back.

　　如果你的孩子渴望學習，那就不要毫無益處地進行阻攔。

　　She was suddenly thirsty and dry.

　　她突然口渴了。

　　Some kinds of food makes one thirsty.

　　有些種類的食物使人口渴。