The T-cell precursors then go to the thymus, a small organ located under the breastbone, where they are called early thymic progenitors (ETPs).

然后，T细胞的前体前往胸腺——一个位于胸骨下的小器官，在那里，它们被叫做早期胸腺祖细胞(ETPs)。

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Though ETPs have been growing rapidly (see chart 2), their total value is less than $200 billion, less than one-seventh of that of conventional ETFs.

尽管ETPs正在快速的增长（见表2），它们的总价值仍然低于2000亿美元，比传统的ETFs的1/7还要少。

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Since ETPs showed the potential to give rise to myeloid cell types, the team also asked whether some of the myeloid cells in the thymus normally arise from ETPs.

鉴于早期胸腺细胞表现出具有生成髓系细胞的能力，小组提出，是不是胸腺内的一些髓细胞通常来源于这些细胞。

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The decline in commodity ETPs assets would have been worse if not for the precious-metals sector.

FORBES: ETF Securities: Precious-Metals ETPs Attract Money Inflows In 2Q; Overall Commodity ETP Market Declines

ETPs themselves continue to grow in popularity among portfolio managers, financial advisors and individual investors.

FORBES: It's Not Really A Lost Decade

Brooks spoke on a conference call reviewing the activity in commodity ETPs for the third quarter.

FORBES: Gold ETPs See Greatest Inflows In Third Quarter -- ETF Securities