While it was known that the ability to form neural crest cells declines after "stage 10," the researchers were seeking the earliest conditions surrounding formation of these important stem cells.

虽然已知形成神经嵴细胞的能力在“阶段10”后会衰减，研究者们仍在寻找这些重要的干细胞形成早期的周围条件。

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They are of different wave-originatedtimes, wave-originated stages, and wave-crest belts, and different preferential propagation directions and effective action ranges for each stage.

它们具有不同的起波年份、起波期和波峰带，而各期波的优势传播方向和有效作用范围又有所不同。

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The National Weather Service had predicted that the river would crest to about 19 feet above flood stage.

国家气象台曾预报红河将上涨到洪水位以上19英尺。

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Into this drama, enter from stage left, Crest Financial.

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Volunteers in the tiny community have worked endlessly since Wednesday to build a makeshift sandbag levee that seemed to be holding as the crest expected to be 11 feet above flood stage approached.

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