Christendom means all the Christian people, or all the countries thought of as Christian, taken as one big group. It is an old, high, history-book word. Writers used it for “the Christian world,” especially in the Middle Ages and after, when they set that world beside lands that were not Christian.

ChristendomChristendom means意思是 all the Christian people所有的基督徒，or或 all the countries thought of as Christian所有被視為基督教的國家，taken as one big group當成一個大整體來看；it是 an old, high, history-book word一個古老、莊重、歷史書式的字；writers作家 used it for「the Christian world」用它來指「基督教世界」，especially尤其是 in the Middle Ages and after在中世紀及之後，when當時 they set that world beside lands that were not Christian他們把這個世界拿來跟非基督教的土地相對照。

Today you still meet it in history, church writing, and rather grand speech. You do not use it for your local church, or for one country on a map.

Today今天 you still meet it你還是會在 in history歷史、church writing教會文章、and而 rather grand speech比較莊重的言論裡遇到它；you do not use it你不會用它 for your local church來指你當地的教會，or或 for one country on a map地圖上的某一個國家。

Though actually, it never meant “every person on earth is Christian.” It meant the Christian part of the world as people then pictured it. It is not the same as Christianity, which is the religion itself.

Though actually不過事實上，it never meant「every person on earth is Christian」它從來不是指「地球上每個人都是基督徒」；it meant它指的是 the Christian part of the world as people then pictured it當時的人所想像的世界裡基督教那部分；it is not the same as Christianity它跟Christianity不一樣，which是 which is the religion itself宗教本身。