求一篇英语作文：write a short passage of 60-80 words about swimming safety1.下水前先运动半小时,这样腿不会抽筋 2.不要独自一人去游泳 3.不要到太深的水中去游泳 4.不要在水中游得太久 key words：twitch
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求一篇英语作文：write a short passage of 60-80 words about swimming safety1.下水前先运动半小时,这样腿不会抽筋 2.不要独自一人去游泳 3.不要到太深的水中去游泳 4.不要在水中游得太久 key words：twitch
求一篇英语作文：write a short passage of 60-80 words about swimming safety
1.下水前先运动半小时,这样腿不会抽筋 2.不要独自一人去游泳 3.不要到太深的水中去游泳 4.不要在水中游得太久 key words：twitch（肌肉等）抽动,痉挛,avoid,danger
求一篇英语作文：write a short passage of 60-80 words about swimming safety1.下水前先运动半小时,这样腿不会抽筋 2.不要独自一人去游泳 3.不要到太深的水中去游泳 4.不要在水中游得太久 key words：twitch
自己删减一些 More hot days, the public swimming pool has become a favored place, leisure Xiaoshu, we can feel good fitness. A pool of blue water, has a lovely, but there is also potential danger. When launched, it is necessary to strengthen self-protection, can not be taken lightly. Children can not be launched personal, leisure areas and should have his or her parents; swimming beginners should be 1.4 meters below the shallow waters, and not alone in the pool practicing "Bieqi" so as not to choke water accidents, not in shallow water , The water in the region, "Zha Mengzi" to prevent head impact the bottom or wall are dangerous. Special needs to be emphasized is that alcoholics do not swim. Because people in the consumption of wine, after dinner, more blood will flow of movement of organs and skin, which will make brain blood supply shortage. And alcoholics in the water to breathe, his head constantly about swing and the head, bow, coupled with wave Dangyangguanru ears, the brain will be to stimulate the vestibular organ, causing dizziness and loss of balance, are dangerous.