The company says the results represent a significant breakthrough and is the first time such a low dose of H5N1 antigen has been able to stimulate such a level of strong immune response.

这个公司说这个结果代表了在这方面的一个重大突破，这是首次用如此低剂量的H5N1抗原产生如此强的免疫反应。

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The level of bone Cu in low dose anti-fluorine agent group was lower than that in fluorine agent group.

骨铜在低剂量的拮抗组中含量显著低于对应剂量的染氟组。

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Objective To investigate the effect of gamma irradiation at low dose-rate on the level of IL - l2 and IL-10 in the plasma of mice.

目的研究低剂量电离辐射对小鼠免疫系统影响的剂量率效应。

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It too can be treated with painkillers, but other drugs such as low-level dose antidepressants and anticonvulsants can also help.

BBC: Doctors call for improved pain care