評論
打印
Professor: Many organisms have developed the ability to survive in harsh environmental conditions: extreme heat or cold, or very dry conditions, like plants in the desert.
教授：很多生物進(jìn)化出了在嚴(yán)酷的環(huán)境狀況下生存的能力，比如極熱或極冷、或非常干旱的環(huán)境，就像沙漠里的植物一樣。
Your textbook doesn’t have much about the specifics on desert plants, but I think that desert plants are great examples of specialized adaptations to extreme environmental conditions.
你們的課本上沒有很多具體介紹沙漠植物的內(nèi)容，不過我認(rèn)為沙漠植物是專門適應(yīng)極端環(huán)境狀況的很好的例子。
So, with desert plants, there are basically three different adaptive strategies.
沙漠植物主要有三種不同的適應(yīng)策略。
And I should point out that these strategies are not specific to any particular species.
我應(yīng)該指出的是，這些策略不是針對任何具體品種的植物的。
Many different species have developed each of the adaptations.
很多不同種類的植物都進(jìn)化出了每種適應(yīng)策略。
So, first off, there are succulent plants, there are many different species of succulent plants, but they all can absorb and store a lot of water.
首先是肉質(zhì)植物，有很多不同品種的肉質(zhì)植物，但它們都能吸收和儲存很多水分。
Obviously, opportunities to get water in the desert are few and far between, generally rains are light and short, so the rain doesn’t seep too far down into the soil.
顯然，在沙漠能獲得水的機(jī)會很少，而且間隔很久，一般那里的降雨很少而且時間很短，所以雨水不會滲到地下很深的地方。
And there’s a limited window of time for any plant to get the water before it evaporates.
而且任何植物要在雨水蒸發(fā)前得到這些水的時間窗也是有限的。
