1. on approval : 包退包换的；
名词
Production Problems-(产品问题)
1. 赞成；同意
If you win someone's approval for something that you ask for or suggest, they agree to it.
2. 认可;通过
Approval is a formal or official statement that something is acceptable.
3. 赞许;嘉许
If someone or something has your approval, you like and admire them.
4. （正式）认可;批准;核准
If a person or organization gives something their seal of approval or their stamp of approval, they officially say that they like it or think it is acceptable.
1. the formal act of approving
e.g. he gave the project his blessing
his decision merited the approval of any sensible person
2. a message expressing a favorable opinion
e.g. words of approval seldom passed his lips
Synonym: commendation
3. a feeling of liking something or someone good
e.g. although she fussed at them, she secretly viewed all her children with approval
4. acceptance as satisfactory
e.g. he bought it on approval