托福写作主要考察学生对词汇、语法的掌握，以及逻辑和结构构架能力，一篇好的托福写作范文能够帮助同学们抓住托福写作的得分点，并能给大家提供提供高分词汇和句式。下面，我们就来看一篇托福写作范文：利他主义。
New findings in scientific areas can examine and challengeprevious assumptions. A recent finding concerning the meerkat,a burrow-dwelling animal in the African grasslands, has castdoubt upon the conventional ideas of altruism, the type ofbehavior in which an animal sacrifices its own interests for thebenefit of another.
Meerkats were previously thought to be a typical altruisticanimal. When the other meerkats feed, there is usually one meerkat watching out for predators.The sentinel meerkat gains nothing, it seems, for it can neither eat nor escape quickly andsuccessfully after raising an alarm.
However, in the new findings, it's shown that the sentinel meerkat has already eaten food beforestanding guard, thus contradicting the thought that it has an empty belly while on the lookout. Inaddition to this, the sentinel is the first to see a predator, so it is the first to escape. It is also placednearest a burrow, making it relatively easier to flee. Moreover, its alarm calls may cause the groupeither to gather or to spread rapidly, which may attract the predator's attention, providing thesentinel a better chance to escape.
The same is with supposed human altruistic behavior. Organ donation to strangers may beconsidered an unselfish act, which provides little reward to the donator. However, by donating hisorgan, the donator may most probably receive praise and appreciation from others. Isn't this non-material reward, which increases one's self worth, satisfactory to anyone?
以上是本期前程百利为大家整理的托福写作范文，大家可以根据范文的思路提取自己的写作摸板，前程百利祝大家都能取得理想的考试成绩。
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