尽管指数也自有其吸引力，但是它已经受到传统主义者的攻击。

But the indices, although they have their attractions, are already under attack from traditionalists.

youdao

攻击者也可以根据指数只在内部dtd子集中有规律地建立实体引用，这样，就会使小的输入文档制造出大量的文本。

An attacker could also exponentially build up entity references purely in the internal DTD subset so that a small input document produces a large quantity of text.

youdao

在攻击频率和次数上，呈指数型增长。

In attacking frequency, attacking events have grown up with exponential rate.

youdao