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雅思聽力section4高頻場景詞匯:Longevity of whales

雅思聽力section4高頻場景詞匯:Longevity of whales

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Now a study of killer whales offers some clues about why evolution may have selected for such long life(為什么進化會造成雌鯨長壽): older females have accrued what the study authors call “repositories of ecological knowledge,” that can help their entire group survive.?

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The researchers examined more than 750 hours of killer whale video. They saw that older, wizened females were the individuals most likely to lead younger whales to salmon feeding grounds, especially during lean times. The study is in the journal Current Biology.?

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The work provides the first evidence that the advantage conferred via the knowledge held by elderly female whales may be behind the adaptation for their post-fertility longevity. In humans, an analogous explanation for post-menopausal longevity is part of what’s called “the grandmother effect,” the constellation of attributes that make older women especially valuable to the community. Whale grandmas appear to be highly valuable, too.

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a biological cap:一個生理限制

reproductive years:可生育年限

an evolutionary standpoint:一個進化的角度

wondervt 好奇,想弄明白? n 奇跡,奇觀? adj 神奇的

longevity: n 長壽,長期供職,壽命

fertilityn 肥力,繁殖力

Other than:除了,不同,不是

short-finned pilot whales短鰭領航鯨 killer whales

menopause:更年期

accrue: vi 增加,積累? vt 增值

repository: n 倉庫

lean times: 貧瘠時代

adaptation:n 適應,順應

post-fertility longevity 生育后的長壽

analogousadj 相似的

post-menopausal longevity:經期后的長壽

constellationn 星座,一群人

attributevt 認為,把什么歸于 n 屬性,特征,價值

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