third rail
US /ˌθɜːrd ˈreɪl/
UK /ˌθɜːrd ˈreɪl/
1.
第三軌, 敏感問題
a political issue that is so controversial that any politician who dares to broach the topic will suffer a backlash from voters
:
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Healthcare reform has become a third rail issue in American politics.
醫療改革已成為美國政治中的一個第三軌問題。
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No politician wants to touch the third rail of social security.
沒有政客願意觸碰社會保障的第三軌。