underscore /ˌʌndəˈskɔ:vt划线于下;强调(同underline):These failures underscorethe difficulty of what we're attempting to do. 这些失败显示出我们想做的事情的困难性。The President's visit underscores the administration's commitment to free trade.总统的访问强调了对自由贸易行政管理的义务。