托福写作必备素材：抽象词汇总

Periodic

用法：①ADJ. Periodic events or situations happen occasionally， at fairly regular intervals.

例句：They especially emphasized the need for natural， serene settings where hurried urban dwellers could periodically escape from the city. (2002-01)

例句：This periodic extinction might be due to intersection of the Earth’ s orbit with a cloud of comets， but this theory is purely speculative. (2002-08)

例句：Periodically， molten material wells out of the Earth’s interior to invade the surface layers or to flow onto the surface itself. This material cools into a wide variety of igneous rocks. (1999-01)

例句：The woolly mammoth， along- haired rhinoceros， and other mammals have been periodically exposed in the tundra of Siberia， the hair and red flesh still frozen in cold storage.(1997-12)

例句：Periodic exhibitions of the members’ paintings also included works by noted English artists of the day， borrowed from embryonic private collections in the city. (1999-10)

Peripheral

用法：① ADJ. A peripheral activity or issue is one which is not very important compared with other activities or issues.

例句：Over 100 designated areas exist around the periphery of the Carbbean Sea.(2000-01)

②ADJ. Peripheral areas of land are ones which are on the edge of a larger area.

例句：These are the central nervous system (the nerve cord mentions above)， consisting of the brain and spinal cord， and the peripheral nervous system， consisting of the cranial， spinal， and peripheral nerves， together with their motor and sensory endings.

托福作文写作误区：字数并非越多越好

单纯认为“字数越多越好”的时候，这里是有一定的道理的。因为如果你的字数越多，那么就越能更好的阐明自己的观点，但是很多考生特别喜欢将这种思路一直用。要知道，托福作文在350字—450字就很好了，这个范围内基本上不会对你的分数产生任何负面的影响了。

当然还会马上有人问，如果我的作文字数超过了500字呢?说真的，如果你能有写500字的能力，那么为什么不省下来一些时间，来自己检查一下这篇作文呢?因为当作文达到500字的时候，已经高于托福所要求的字数了，再写多一点已经不会提升你的分数，当然也不会使你的分数降低。因此，这个时候不如好好修改一下已经写过的文章，或者把写过的文章好好润润色。(例如：加入一些强调句式或者倒装句，这样会使自己的文章看上去更有生气。)因此，我们只要能写到350字以上，我们在字数这一点上基本就完成了任务，完全没有一定让自己的作文字数超过500字，要知道“越多越好”也不一定是好的。