请问"an open-ended question"是什么意思?

请问an open-ended question是什么意思? open-end open-ended open-ended discussion是什么意思 open-ended question是什么意思 Open^ended Question答案 open ended investment company是什么 open-ended 该怎么翻译比较合适? 英语翻译原文如下：In contingent valuation,both the dichotomous choice and the open-ended payment card approaches have been commonly used.请问在这里,the open-ended payment card approaches应该如何翻译呢? open ended sleeves是什么意思?棒球服的,老外在问sleeves是不是open ended,[] One day we saw an old man boiling drinking water over an open water.请问怎么翻译,“over an open ended 什么叫做open-ended contract?开放式合同指的是什么意思 they cooked a meal over an open fire.请问：over an open fire怎么翻译?在句中做什么成份? 请问lo que an open casting call an open book love is an open At an“open