英语语法分析

Students and intellectuals have been in the vanguard of revolutionary change in China.

学生和知识分子一直是中国革命变革的先锋。

《柯林斯英汉双解大词典》

It might seem surprising to think about an item staying in space for that long, but the oldest satellite still in orbit—Vanguard 1—turned 60 in 2018.

想到一件物品在太空中停留那么久似乎令人惊讶，但目前仍在轨道上的最古老的卫星——先锋1号——在2018已年满60岁。

The company is proud to be in the vanguard of scientific progress.

这家公司以处于科学发展的领先地位而自豪。

《牛津词典》