NARRATOR: It took a world war for Keynesianism to become government policy.
NARRATOR: It took a world war for Keynesianism to become government policy.
旁白：经过世界大战，凯恩斯理论变成了政府政策。
NARRATOR: It took a world war for Keynesianism to become government policy.
旁白：经过世界大战，凯恩斯理论变成了政府政策。