形成层的向顶分化像初生根伸长一样在继续进行。

Acropetal differentiation of the cambium layer continues as the primary root elongates.

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为了核实清洗效果，可以采用更低的压力对射孔段进行由底向顶的重复冲洗。

To verify the washing effectiveness, the perforated area was then washed a second time, now from bottom to top, and at a much lower pressure.

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“我们向客户推销，我们对他们说，‘瞧，你推广销售需要的钱都在这里了；让我们看看销量有多少增长，’”顶石高管约瑟夫·伊古萨解释说。

"We're pushing [our clients], [saying,] 'Look, you have all the money you need to finance sales; let's see some sales growth,'" explains Joseph Ingrassia, managing member of Capstone.

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