Succeed comes from persistence and indefatigability , only people who always is trying one 's best can achieve succeed .

成功往往考验一个人的毅力、执着与不屈不挠的精神，一个人只有通过不断的努力才能获得成功。

Even among professional speakers , who market their indefatigability , he is known for a startling energy level .

即便是在那些标榜自己不怕疲劳的专业的演讲者中，他也是以充满了活力而著称。