After these three months of studying, my previous thought completely changed. For instance, it is difficult for me to follow the Listening Comprehension Course offered by Professor Chen.

通过这三个月的学习，打破了这种学习观念，特别是陈教授的听力课，对我来说有一定的难度。

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After a month, three months of HIV antibody (HIV) tracking and detection, none of these health care workers were infected with HIV.

经过一个月、三个月的艾滋病病毒抗体(HIV)跟踪检测，这些医护人员均未被艾滋病病毒感染。

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These entries will be discarded within three months after the prize presentation of the contest.

这些参赛作品及个人资料将会在举行比赛之颁奖典礼后三个月内被销毁。

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However, the injected cells remained healthy in animals that were treated with the antibodies, and three months after drug treatment had ended these transplanted cells were even found to be replicating in some of the animals.

ECONOMIST: Breaching the body's defences