Arabia is the big peninsula between the Red Sea and the Gulf. On it sit Saudi Arabia, Yemen, Oman, Kuwait, Qatar, Bahrain and the United Arab Emirates. It is a place-name for that whole land, not the name of one country.

Arabia Arabia is是 the big peninsula between the Red Sea and the Gulf紅海和波斯灣之間那個很大的半島。On it sit Saudi Arabia, Yemen, Oman, Kuwait, Qatar, Bahrain and the United Arab Emirates沙烏地阿拉伯、葉門、阿曼、科威特、卡達、巴林、和阿拉伯聯合大公國都座落在這個半島上。It is a place-name for that whole land, not the name of one country這是指整片土地的地名，不是某一個國家的名字。

Though actually, in everyday talk people often say Arabia when they only mean Saudi Arabia, which is the largest state on the peninsula — tidy, but not exact. History books also say Arabia for older kingdoms on that same land.

Though actually不過事實上, in everyday talk people often say Arabia when they only mean Saudi Arabia在日常對話裡，人們常常只想講沙烏地阿拉伯，卻說Arabia, which is the largest state on the peninsula——tidy, but not exact沙烏地阿拉伯是這個半島上最大的國家——方便，但不精確。History books also say Arabia for older kingdoms on that same land歷史書也會用Arabia來稱呼這片土地上比較古老的王國。

Students in Taiwan already know 波斯灣 for the Gulf; some people in the region prefer to call it the Arabian Gulf, but you do not need that fight in class.

Students in Taiwan already know 波斯灣 for the Gulf台灣的學生已經知道波斯灣這個說法;some people in the region prefer to call it the Arabian Gulf該地區有些人比較喜歡叫它Arabian Gulf, but you do not need that fight in class但你在課堂上不需要牽扯進那場爭論。

Always capital A. You cannot have “an Arabia.”

Always capital A永遠要大寫A。You cannot have "an Arabia."你不能說「an Arabia」。