在神经发生和早期大脑发育过程中，外切核苷酸酶通常下调嘌呤能信号传导。

During neurogenesis and in early brain development, ectonucleotidases often downregulate purinergic signalling.

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有线索表明，在与细胞发育成各种组织相关的早期胚胎的功能中，逆转录酶是必需的。

There are hints that reverse transcriptase is needed for a lot of early embryonic functions associated with getting cells ready to specialise into different types of tissue.

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神经氨酸酶抑制剂的疗效特别取决于其早期使用(在症状出现后48小时之内)。

The efficacy of the neuraminidase inhibitors depends, among others, on their early administration (within 48 hours after symptom onset).

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