这种药物有一个很大的限制因素，其药效只能持续6个小时。
This drug has one important limitation. Its effects only last six hours.
较贵的药物--雷珠单抗注射液（Lucentis）--每注射一次2000美元（约13600元），病患可能每4-6周就需要注射一次。 毫无疑问它的药效良好；实际上，这是第一种针对AMD可以扭转视力下降的有证药物。
The expensive version - Lucentis - is about $2000 per injection, and patients may need a shot every 4 to 6 weeks.
通常当一个病人初始用药效果不好时，医生就会给他增加用药，但是这对于那些已经有其他健康问题，已经在用10至15种药的人是不可行的。
Often when a patient doesn’t respond to the first drug, an additional drug is given, but that’s not always practical for patients who are already taking 10 or 15 drugs for other health problems.
没有药物能治愈它，也没有药物对此有长期疗效。 那些提升大脑关键化学成分的药物不是对每个人都适用，而且它们的药效也会随着时间流逝而减弱。
There is no cure and existing drugs, which raise levels of key brain chemicals, do not work for everyone and their effects wear off over time.
医生和研究人员目前正在探索如何使用这两种药物才能把两者的药效发挥到最佳，可能是服用有先后顺序或同时服用。
Doctors and researchers will now explore how to best use these drugs -- give one before the other, or simultaneously.
“克他命有相反的效果，可以顶住或者逆转抑郁症状”，每服用一次药效可达大约7天。
"Ketamine has the opposite effect and can oppose or reverse the effects of depression" for roughly seven days per dose.
根据派普和同事在《细胞》(Cell)期刊上发表的报告，因为与Medivation和辉瑞制药的实验性阿斯海默症治疗药物Dimebon 成份相似，这种化合物有可能提供更多改善该药药效的方法。
The compound is similar to Medivation Inc and Pfizer Inc's experimental Alzheimer's drug, Dimebon, and may provide ways to improve its effects, Pieper and colleagues reported in the journal Cell.
“听说你有一种药效神奇无可比拟的药物，”艾伦问道，“这是真的吗？”
"Is it true, " asked Alan, "that you have a certain mixture that has-er-quite extraordinary effects?"
有些具有刺激性或有毒，有些一药多效，经过不同的炮制方法有不同的药效。
Some of them are stimulus or toxic, some of them have different effect through different method of processing.
结果表明，橄榄对所试菌株有较为明显的抑制作用，黄酮类物质及没食子酸可能是其抑菌防腐的主要药效成分。
The results showed that olive had antimicrobial activity on all the strains tested, and flavonoids might be an important composition for this function.
试验结果同时反映现行的蚊香试验和评价标准难以全面评价蚊香实际使用效果，有必要应用野外蚊虫进行测试并研究抗药性与药效关系。
The result of lab test can not reflect the application effect in field test, so it is necessary to use mosquitoes in field for resistance and efficacy test.
结果表明：不同溶剂提取部分的药效有明显差异。
The results show that the different extractions have obvious variance.
药效学实验表明，该验方制剂对人工感染小鼠有不同程度的保护作用，与对照组比较差异显著。
Pharmacodynamic experiments showed that the prescription preparation could protect artificially infected mice in various degrees. The difference was significant compared with control group.
药效学分析表明蛋白酶体抑制药的抑制作用有剂量依赖性和可逆性。
Pharmacodynamic assay has shown that inhibition of proteasome is dose dependent and reversible.
田间药效试验结果表明，用10%吡·灭WP防治棉蚜有良好的防治效果。
The field efficiency test of the insecticide showed that 10% Pi-Mie WP solution was safe to crops and could effectively control cotton aphid.
相须、相使是中药药效有协同作用的配伍，可以增强中药的疗效。
Phase to be compared with the efficacy of a synergistic effect of Chinese medicine compatibility, can enhance the efficacy of traditional Chinese medicine.
相须、相使是中药药效有协同作用的配伍，可以增强中药的疗效。
Phase to be compared with the efficacy of a synergistic effect of Chinese medicine compatibility, can enhance the efficacy of traditional Chinese medicine.
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