What Are Those Marks on the Olympic Athletes?(翻译)

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freestyle– n. an Olympic swimming event where athletes move themselves in the water using a crawling motion with their arms and kicking with their legs

relay – n. a race between teams in which each team member runs, swims, etc., a different part of the race

therapy – n. the treatment of a physical problem or illness

suction – n. the act or process of removing the air, water, etc., from a space in order to pull something into that space or in order to cause something to stick to a surface

disorder – n. a physical or mental condition that is not normal or healthy

bruise – n. a dark and painful area on your skin that is caused by an injury