You must not think that what is hard for you to master is humanly impossible; and if it is humanly possible, consider it to be within your reach.
你不应该认为对你来说难以掌握的东西是不可能的,如果是人类可以实现的,就应该认为它是可以实现的。
Sustainability isn't an option; it's a responsibility we owe to future generations.
自由民主在世界范围内的传播并非不可避免,但它是历史进程中最可能的结果。
妈妈必须同时喂养孩子的身体和精神,且精神上的需求更重于身体的需要。