【小編寄語】詞典不是最重要的，關鍵在于語境。可以說，單詞沒有多少實際運用的價值，機械記憶的單詞量再大，也不會真正提高你的外語水平。因此，從今天開始，可可聽力頻道針對“零英語”基礎的朋友們，專門推出這檔“聽基礎單詞,練聽力”的節目。每天我們之需要你聽懂一個詞，并提供一段相應的對話，加深大家的印象。相信滴水可以穿石，付出總會有收獲的！

【今日基礎詞】Effective

【Transcript】

Eagle has the world’s longest life expectancy of birds. It lives up to the age of 70. To live such a long life expectancy, at 40 years of age it must make a difficult but important decision.

When the Hawks live up to the age of 40, its claws start aging, unable to effectively seize the prey. Its wings have become very heavy because its feathers grow thick and strong and make it very difficult to fly.

There are only two options:die, or rebirth through a very painful update process of 150-day long training session.

來源:可可英語 http://www.ccdyzl.cn/Article/201006/106490.shtml