这些太空探索的先驱者们为人类登月铺平了道路。

These ___pioneers of space exploration paved the way for human moon landings.

这家公司率先在人工智能领域进行了创新研究。

This company ___pioneered innovative research in artificial intelligence.

我们学校的少先队员们每周五下午都有集会活动。

The ___Pioneers in our school have a gathering every Friday afternoon.