Opioids are a group of drugs meant to reduce pain.

阿片类药物是旨在减少疼痛的一组药物。

" Work in groups" , means get into a few people together; three, four, five.

“群策群力” ，就是几个人聚在一起；三、四、五。

Hannah conducted the focus groups, meaning that she organized them, invited people to them, and led the discussion.

汉娜主持了焦点小组，这意味着她组织了他们，邀请人们加入他们，并领导了讨论。

It is a branch of the Indo-European  linguistic group, meaning it belongs to the same family of languages that have  produced modern-day tongues such as English, Spanish, French, German, Hindi, Punjab,   Persian, Italian, and Portuguese.

它是印欧语系的一个分支，这意味着它属于产生现代语言的同一语系，例如英语、西班牙语、法语、德语、印地语、旁遮普语、波斯语、意大利语和葡萄牙语。

One of their number, Deborah, slams about what the group means to her: " I love you, you respect me, we give each other advice, we are working together to build a community, " she intones in Swahili.

“我爱你们，你们尊重我，我们互相建议，我们共同致力于建立一个诗喃者的社区。”

And some researchers have pointed out that this research is pretty limited, too: It suffers from things like small sample sizes and sometimes-missing control groups — meaning people who got therapy weren't compared to a group that didn't.

一些研究人员指出，这项研究相当有限，它也存在样本量小，有时缺少对照组的问题，这意味着接受治疗的人与没有接受这种治疗的人群相比，并没有可比性。

" Last but not least" is a phrase used to talk about the last person or thing in a group, meaning that it is not less important, however, than the other people or things that were already mentioned.

最后但并非最不重要”是一个短语，用于谈论群体中的最后一个人或事物，这意味着它并不比已经提到的其他人或事物重要。