Does these sentences make sense? Let me know about any mistake please! I have met many people in the workplace environment and from other friends. From whom I have learned a lot, due to the diversity of lifestyles, age.

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nowadays, the athletes can't train without a doctor. they work with psychologists and nutritionists. most athletes use drugs, but the drugs they use are strictly controlled by the doctors who look after them. i once met an athlete who said to me "a victory means hard work." all you need is luck and an awful lot of training. he was strongly opposed to the use of drugs. he used to say that a victory he won over is competitors at the olympics was the result of hard work and strong discipline. he has now become a biologist and works seven days a week in the laboratory experimenting new substances for athletes.

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