You put BC after a year to show that the year is before the birth of Jesus Christ, on the timeline most history books still use. 44 BC is the year Julius Caesar died. The numbers get smaller as you move toward that birth: 500 BC is later than 800 BC.

You你 BC把 BC after a year放在年份後面， to show that用來表示 the year那一年 the birth of Jesus Christ在耶穌基督出生 is before之前—— most history books still use就在大多數歷史書仍在用的 on the timeline那條時間軸上。 44 BC44 BC Julius Caesar是凱撒 died死去的 is the year那一年。 as you move toward that birth當你朝那次出生走近， The numbers數字 get smaller會越變越小： 500 BC500 BC than 800 BC比 800 BC is later更晚。

This is school and history language, not slang. Though actually, the people living in 500 BC did not call their year “500 BC”; later writers stamped this label on the past.

This這 is school and history language是學校和歷史的語言， not slang不是俚語。 Though actually不過其實， living in 500 BC活在西元前五百年的 the people人 did not call their year並不把他們自己的年份叫做 '500 BC'「500 BC」； later writers是後來的書寫者 this label把這個標籤 on the past蓋到過去 stamped身上的。

Some writers now prefer BCE for the same dates, so the world’s timeline does not have to name Christ. AD (or CE) marks years after that point. Careful: this system has no year zero — 1 BC is followed by AD 1.

Some writers有些作者 now現在 for the same dates對同樣的年份 prefer BCE比較喜歡用 BCE， so這樣 the world's timeline世界共用的時間軸 does not have to name Christ就不必提到基督的名字。 AD (or CE)AD（或 CE） marks標的是 after that point那個點之後 years的年份。 Careful小心： this system這套系統 has no year zero沒有第零年—— 1 BC1 BC is followed by AD 1後面接的就是 AD 1。