下面這句話挺好的，只是不懂怎么譯：Olympic athletes have pushed back the frontiers of their sports by developing new techniques.

熱心網(wǎng)友

Olympic athletes have pushed back the frontiers of their sports by developing new techniques.奧林匹克運(yùn)動(dòng)員依靠不斷發(fā)展的新技術(shù)提高了他們的運(yùn)動(dòng)極限。這里frontier"邊界"（是不能輕易越過(guò)的）引申為"極限"push back "使后退"。 使"邊界"后退，既使邊疆?dāng)U大了，引申"提高極限"

熱心網(wǎng)友

奧林匹克運(yùn)動(dòng)員通過(guò)不斷開(kāi)發(fā)的新技術(shù)來(lái)提高他們的運(yùn)動(dòng)潛能。

熱心網(wǎng)友

Olympic athletes have pushed back the frontiers of their sports by developing new techniques.譯文：奧林匹克鍵兒們通過(guò)發(fā)展他們的新技能來(lái)推進(jìn)他們體育運(yùn)動(dòng)的潛能（新領(lǐng)域）。push back:推進(jìn)，推出，推回。。這里應(yīng)該翻成推進(jìn)；frontiers:邊界，領(lǐng)域，這里應(yīng)該翻成領(lǐng)域，引申為潛能。