小伙伴們，托福考試大家復(fù)習(xí)的怎么樣了呢？下面是幫考網(wǎng)分享的一些托?？荚嚶?tīng)力部分的復(fù)習(xí)資料，一起來(lái)看看吧！

Before moving on to a new topic, I want to finish up our unit on arachnids by looking at what may seem a very unusual aspect of spider behavior, a species where the young spiders actually consume the body of their mother.

在轉(zhuǎn)到新的主題之前，我想結(jié)束我們?cè)谥胄尉V上的單元，通過(guò)著眼于一個(gè)看似非常不同尋常的蜘蛛行為的方面，年幼的蜘蛛實(shí)際上消耗他們母親的身體的一個(gè)種群。

Unlike most other spiders, this species lays one, and only one, clutch of 40 eggs in her lifetime.

不像大多數(shù)其他蜘蛛，這個(gè)種類(lèi)在她的一生中下一窩，而且只下一窩，40只卵。

The young spiders hatch in mid-spring or early summer, inside a nest of eucalyptus leaves.

年幼的蜘蛛在仲春或初夏，在一個(gè)桉樹(shù)葉的窩里面。

Their mother spends the warm summer months bringing home large insects—often 10 times her weight—for meal.

它們的母親消耗了幾個(gè)月的溫暖的夏季(時(shí)光)將大型的昆蟲(chóng)帶回家——通常10倍于她的重量——當(dāng)食物。

The catch is always significantly more than her young spiders can eat.

捕獲物總是大大地多于她的年幼的蜘蛛(幼仔)所能吃掉的。

So, the mother fattens herself up on this extra prey and stores the nutrients in her extra unfertilized eggs.

因此，(蜘蛛)母親用這些額外的獵物把自己養(yǎng)肥，并且把營(yíng)養(yǎng)素儲(chǔ)存在她另外的非受精卵中。

As the weather turns colder, there are fewer insect prey to hunt.

隨著天氣轉(zhuǎn)冷，能捕獵的昆蟲(chóng)獵物很少了。

That\'s when the nutrients stored in those extra eggs begin to seep into the mother\'s bloodstream.

那就是當(dāng)儲(chǔ)存在這些另外的卵中的這些營(yíng)養(yǎng)素開(kāi)始滲入到母親的血流中的時(shí)候。

So, when there are no more insects to feed to the young spiders, they attach themselves to the mother\'s leg joints and draw nourishment by sucking the nutrient-rich blood.

所以，當(dāng)沒(méi)有更多的昆蟲(chóng)來(lái)喂養(yǎng)年幼的蜘蛛時(shí)，它們把它們自己貼在母親的腿關(guān)節(jié)上，通過(guò)吮吸營(yíng)養(yǎng)豐富的血液來(lái)吸取營(yíng)養(yǎng)。

After several weeks, the mother is depleted of all nutrients and she dies.

幾周之后，母親被耗盡所有的營(yíng)養(yǎng)并死去。

But then how do the young get nourishment?

然而幼仔如何獲取營(yíng)養(yǎng)呢?

They start to feed on one another.

它們開(kāi)始以彼此為食。

Now, if you recall our discussion of Darwin, you\'ll see the evolutionary value of this: Only the strongest spiders of the clutch will survive this "cannibalism," and the mother spider will have ensured that her genes have an increased chance of survival through future generations.

現(xiàn)在，如果你記得我們關(guān)于達(dá)爾文的討論，你將看到這種進(jìn)化的價(jià)值：只有窩里最強(qiáng)壯的蜘蛛將會(huì)在這種“嗜食同類(lèi)”中生存，蜘蛛母親將會(huì)確保她的基因憑借未來(lái)的后代增加生存的機(jī)會(huì)。

好了，以上就是今天分享的全部?jī)?nèi)容了，各位小伙伴根據(jù)自己的情況進(jìn)行查閱，希望本文對(duì)各位有所幫助，預(yù)祝各位取得滿(mǎn)意的成績(jī)，如需了解更多相關(guān)內(nèi)容，請(qǐng)關(guān)注幫考網(wǎng)！