"补充"在英文中可以用 "supplement" 或 "additional" 来表示。
"Supplement" 来源于拉丁语 "supplementum"，意思是 "something added to complete a thing, make up for a deficiency, or extend or strengthen the whole"。
例句：
I'm taking a dietary supplement to help me lose weight.
翻译：我在服用一种膳食补充剂来帮助我减肥。
The report includes a supplement on the company's financial performance.
翻译：报告中包括了关于公司财务状况的补充。
"Additional" 来源于拉丁语 "additionem"，意思是 "something added; something extra or additional"。
例句：
The company is looking for additional funding to expand its operations.
翻译：公司正在寻找额外的资金来扩大其业务。
We have additional information about the product that we would pke to share with you.
翻译：我们有关于这个产品的额外信息，我们想要和你分享。