The task facing medicine in the twenty-first century will be to redefine its limits even as it extends its capacities.
21世纪医学面临的任务将是重新定义其限制，即使它扩大了其能力。
2
In our times, human shrewdness has mastered the deep mysteries of the earth at a level far beyond the capacities of earlier peoples.
在我们这个时代，人类的精明已足以掌握地球的深层奥秘，其程度远远超过了早期人类的能力。
3
These days, safety regulations—not to mention the modern sports fan's desire for a good view and comfortable seat—tend to keep stadium capacities slightly lower.