A cascade of genes orchestrate a series of events leading to formation of blood vessels in an embryo.

级联的基因控制的一系列的事件参与了胚胎中血管的形成。

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The key to produce this shallow gas is to use a set of negative suction technique besides that a series of measures for protecting the shallow gas-bearing formation must be adapted while drilling.

要把这类浅层气开采出来，除必须实施保护浅气层的钻井措施外，关键在于采用一套负压抽汲采气技术。

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Specially is devoting to the expansion "the belt retainer productbattle formation - S series" product battle formation.

特别是正致力于扩充“带保持器产品阵容-S系列”的产品阵容。

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During the dance, partners move through a series of passes and turns in a star formation, pivoting around each other before meeting in the centre for a final bow.

BBC: Stepping into Salta��s folklore culture

While union power dwindled during the 1990s with declining membership, the formation of "superunions" through a series of recent mergers has created organisations with huge industrial clout.

BBC: Union revival 'risks industrial peace'

The company bought the CDMA business from China Unicom, and a series of acquisitions between 2003 and 2008 led to the formation of the company as we know today.

FORBES: China Telecom Has Room To Run Up To $68