The drug works by blocking the action of HIV's enzyme reverse transcriptase, stopping the virus from replicating in cells.

该药物的作用机理是通过阻断艾滋病毒逆转录酶，阻止病毒在细胞内复制。

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The team have found that blocking the action of a gene seems to make healthy cells immune to even very large doses of radiation.

这个研究小组发现，阻断一种基因可以使健康细胞对放疗产生免疫力，即使对于大剂量的放疗也同样有效。

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Now scientists have discovered that the key to scar-free wound healing could involve blocking the action of a common sugar.

当今，科学家已经发现治疗无疤痕伤害的关键在于阻隔普通糖分子的活跃。

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Many farmers look enviously at their French counterparts' direct action of blocking ports.

BBC: Ben Gill - farmers' leader under pressure

They found a particular piece on the surface of the bacteria, which they have called SpyCEP, is responsible for blocking the action of IL-8.

BBC: NEWS | Health | How the flesh-eating bug attacks

In these cases, treatments based on blocking the action of the hormone may be offered.

BBC: Q&A: Breast screening