一旦苏维埃宫殿建成，他将是世界上最高的建筑物。

If the Palace of Soviets was built, it would have become the world's tallest structure.

youdao

一旦苏维埃宫殿建成，他将是世界上最高的建筑物。

If the Palace of Soviets was built, it would have become the world's tallest structure.

youdao