Modern methods for tracking polar bear populations have been employed only since the mid-1980s, and are expensive to perform consistently over a large area.

跟踪北极能种群的现代方法仅在20世纪80年代中期才被采用，而且，要在大范围内连续采用这种方法，其代价非常高昂。

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Modern relational databases have incredible amounts of capacity and perform incredibly well on multiple CPU systems.

现代的关系数据库具有惊人的容量，在多cpu系统上执行效果非常好。

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Today's modern computer systems are advancing in complexity and at times perform concurrent tasks.

今天的现代计算机系统在复杂性和有时执行并发任务方面不断进步。

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The situation is noticeably different (and worse) for our modern indentureds, the young and talented men who perform their craft on the gridiron or the hardwood, but lack the ability to negotiate a free market wage.

FORBES: National Letter of Indenture: Why College Athletes are Similar to Indentured Servants of Colonial Times

As margins come under pressure, especially in the civil business, Boeing can at least take heart from the fact that its factories now look (and, with luck, will perform) a bit less like giant garage workshops, and a bit more like modern manufacturing plants.

ECONOMIST: Boeing's bleak outlook

The studio where the bands perform is decorated with old signs, while a specially built stage and modern lighting give an intimate feel.

BBC: India��s indie music scene