英语语法分析

These results provide support for researchers' prediction that naltrexone will turn out to be toxic to certain types of bacteria.

这些结果支持了研究人员的预测，即纳曲酮对某些类型的细菌是有害的。

When mice are given both morphine and the new drug naltrexone, blood poisoning is much less frequent, although it does still occur.

当老鼠同时服用吗啡和新型药物纳曲酮时，虽然仍会发生血液中毒，但发生的频率大大降低。

So, the role of naltrexone improving memory is also required further study.

对纳曲酮改善记忆的作用还需要做进一步的研究。