Researchers say the avatar world at large grew more than twentyfold between 2006 to 2009 and has now reached about 15 million.

研究者称虚拟形象的数量在2006到2009年间暴增了二十倍，现在已达到1500万。

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Hsieh and Lin won't say how many shares they bought, but their investment has grown twentyfold.

FORBES: Tadpoles

It developed Blast, which will soon let wireless carriers provide video or handle a twentyfold increase in calling traffic over a single frequency.

FORBES: Lucent's Labs