Introduce the different types of contra-asset accounts related to Accounts Receivable: Allowance for Doubtful Accounts ("ADA"), Allowance for Returns, and Deferred Income Liability.
介绍与应收款项相关的各类资产备抵科目：备抵可疑帐户（ADA），备抵销货退回，以及递延所得。
2
The Allowance for Doubtful Accounts often is described as a contra-asset account.