VOA慢速英语:你可能脱水的征兆

hydrated – v. to supply (something) with water ­– adj. to drink enough water : Remember to stay hydrated.

dehydrated – v. to lose too much water

saliva – n. the liquid produced in your mouth that keeps your mouth moist and makes it easier to swallow food

thirst – n. an uncomfortable feeling that is caused by the need for something to drink

athlete – n. a person who is trained in or good at sports, games, or exercises that require physical skill and strength

carbohydrate – n. any one of various substances found in certain foods (such as bread, rice, and potatoes) that provide your body with heat and energy and are made of carbon, hydrogen, and oxygen

mood – n. the way someone feels : a person's emotional state

focus – v. to direct your attention or effort at something specific

fluid – n. capable of flowing freely like water

muscle cramp – medical noun A muscle cramp is a strong, painful contraction or tightening of a muscle that comes on suddenly and lasts from a few seconds to several minutes. It often occurs in the legs.