我想知道是什么令他们变活的。

I wanted to know what caused them to become alive.

youdao

按惯例，在开幕式上，吉祥“变活”了，穿着吉祥物服装的演员欢迎着来宾和运动员们。

Traditionally, during the Opening Ceremonies, the mascot "comes alive" as a costumed character and welcomes visitors and athletes to the Games.

youdao

这当然会使试验的争议减小，因为它避免了疫苗变“活”而感染健康人。

This will certainly make for a less controversial trial, as it would avoid any chance of the vaccine going "live" and infecting people who didn't have HIV to start with.

youdao

And then Zeus, Athena and especially Aphrodite, looking down on him, took mercy and brought the statue to life.

宙斯，雅典娜，特别是阿芙罗狄蒂，俯视他，深感同情，于是把雕像变活。

哈佛公开课 - 幸福课课程节选