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

Since those jobs will have to rise twentyfold in the next six years in order for the president to meet his five million green job pledge, hefty new tax hikes will be needed to support them.

FORBES: President Obama's Green Jobs Cost Taxpayers Big Bucks