Whenever possible "Freephone" or similar facilities should be provided so that Respondents can check the Researcher's bona fides without cost to themselves.
无论何时,尽可能提供"免费电话"或类似的
,
被访者应免费查
研究人员的真实
.
Whenever possible "Freephone" or similar facilities should be provided so that Respondents can check the Researcher's bona fides without cost to themselves.
无论何时,尽可能提供"免费电话"或类似的,被访者应免费查研究人员的真实.
：以上例句、词
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