An Olympic athlete must be strong not only in body, but also in mind. They have to train for years to achieve the necessary strength and control over their sports to compete in the Olympics. This requires great discipline and self-sacrifice. Similarly, the Olympic athletes have to train their minds in order to compete under extreme mental pressure. In other words, and Olympic athlete must be in top condition both mentally and physically.
Speaking good English also requires great discipline and self-sacrifice. If you want to speak good English, you must be mentally and physically strong just like an Olympic athlete.
一名奥林匹克运动员不但要有强健的体魄，而且要有良好的心理素质。为了在奥运会上一争高低，他们必须训练多年达到竞技必需的体能要求以及对项目的掌控程度。这需要严格的纪律和伟大的自我牺牲精神。同样，为了能在高强度的心理压力下进行比赛，奥林匹克运动员们必须锻炼他们的心理素质。换句话说，一位奥林匹克运动员要同时具备顶尖的身体素质和心理素质。
要说一口流利的英语同样需要严格的纪律和伟大的自我牺牲精神。如果你想说一口流利的英语，你就必须像奥林匹克运动员一样拥有强健的体魄和过硬的心理素质。