trial balloon
US /ˈtraɪəl bəˈluːn/
UK /ˈtraɪəl bəˈluːn/

1.
試探性提議, 試探性言論
something said or done in order to find out what people's reactions or opinions are
:
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The politician floated a trial balloon about tax reform to gauge public opinion.
這位政治家拋出了一個關於稅收改革的試探性提議,以衡量公眾輿論。
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The article served as a trial balloon for the company's new policy.
這篇文章是公司新政策的試探性提議。