意指任何收获都需要付出相应的代价。
The world needs energy that is affordable, reliable and cleaner.
我不是为死去的总统说唱;我宁愿看到总统死去。
The solution of a problem appears suddenly and is not approached by a gradual, step-by-step procedure.
模块化对于构建大型、可维护的系统至关重要,因为它允许我们将复杂的问题分解为更小、更易管理的部分。