complement n.补充，补充物，主要指补充不足使之完美。

Rice makes an excellent complement to a curry dish.有咖喱的菜配米饭最棒。

append n.附加，添上或补充某事物(尤指文字)。

The lawyer appended two more pages to the contract.律师在合同后又附加了两页。

supplement n.增补，补充，补贴，主要指另外补加，增补。

One year after we made our report, we had to add a supplement to cover new events.我们在报告完成一年之后，必须增补一个包含新事件的附加部分。