https://www.youtube.com/watch?v=7PdEe5t03u8 0:41 the radical left riding high in the opinion polls are holding out for a new general election promising to tear up the austerity agreement. 世論の風を受けた急進左派はギリシャがEUと交わした緊縮財政協定を反故にする公約を旗印にかかげ新たな選挙を呼びかけている。
https://www.youtube.com/watch?v=29ViR462T20 0:15 he was riding high after victory in conservative South Carolina. ロムニー候補は保守の南カロライナ州で勝利してその余韻に浸っていた。
参考リンク
http://bridge-english.blogspot.jp/2013/01/blog-post_949.html 勝ち馬に乗るを英語でなんと言うか?
https://www.youtube.com/watch?v=Vjungcd9XNg 0:21 are you still riding on the high of having achieved this?
https://www.youtube.com/watch?v=EqlJxdQ2vuc 2;25 riding on their success, they released more albums including the top 20 effort, All I Ever Need Is You.