现在不是去想缺少什么的时候，该想一想凭现有的东西你能做什么。

The founders of a new colony, whatever Utopia of human virtue and happiness they might originally project, have invariably recognized it among their earliest practical necessities to allot a portion of the virgin soil as a cemetery, and another portion as the site of a prison.

未来的水产养殖将依赖于智能化和环保技术的结合。