1 sentence

1. 阿波罗计划是人类航天史上的一大壮举。

   ā​bō​luó jì​huà shì rén​lèi háng​tiān​shǐ shàng de yī dà zhuàng​jǔ.

   The Apollo program was a great feat in the history of human spaceflight.

   Source: Dong Chinese Dictionary