ODA is not an ordinary word; it is three letters that stood for the Overseas Development Administration. That was the British government office which used to send money, tools, and people to help poorer countries. After some years the office was given a new name, DFID — the Department for International Development — so ODA is a former name. You will meet it in older newspapers, reports, and history books about British aid, not in everyday talk. The tone is official and rather dry. These same three letters can mean other things in other jobs; this entry is only that old British office.

英國海外發展署（英國國際發展部 DFID 的舊名）