说起托福备考，很多人第一反应就是背词汇，作为语言最基础的单位，词汇自然是我们必须攻克的难题。但是独立的词汇记忆，效果肯定不会很好，所以前程百利托福小编精选了托福阅读词汇笔记系列，让大家记忆词汇的同时也能够复习托福阅读，一举两得，岂不乐哉。本文带来的是笔记九，大家一起在阅读中熟悉并记忆这些词汇吧。
Marjorie Rice was an unlikely candidate for the role of mathematical innovator. She had no formal education in mathematics save a single course required for graduation from high school in 1939. Nonetheless, in 1975 she took up a problem that professional mathematicians had twice left for dead , and showed how much life as in it still.
The problem was tessellation , or tiling of the plane , involves taking a single closed figure a triangle, for example, or a rectangle and fitting it together with copies of itself so that a plane is covered without any gaps or overlap. A region of this plane would look rather like a jigsaw puzzle whose pieces are all identical. Rice worked primarily with polygons, which consist only of straight lines. More specifically, she worked with convex polygons , in which the line joining any two points on the polygon lies entirely within the polygon itself or on one of its edges(A five-pointed star, for example, does not qualify as a convex polygon.)
By the time Rice took up tiling, its basic properties had been established. Obviously, any square can tile the plane, as many kitchen floors have demonstrated. Equilateral triangles are also a fairly clear-cut case. There is one other regular polygon(a polygon whose angles, and sides, are equal) that can tile the plane: the hexagon . This fact was established by the ancient Greeks but had long before been exploited by honeybees in building their honeycombs.
And what of irregular polygons? As it turns out any triangle or quadrilateral , no matter how devoid of regularity, will tile the plane. On the other hand, no convex polygon with more than six sides can do so, and the three classes of convex hexagons that can were uncovered by the end of the First World War. So the only real question left by the time Marjorie Rice began her work was which convex pentagons tile the plane.
unlikely : a. 不太可能的
candidate : n. 候选人,投考者
mathematical : a. 数学的,精确的
innovator : n. 改革者,刷新者
formal : a. 正式的,形式的,礼仪的;n. 正式的社交活动
be left for dead : 没有办法解决的难题
tessellation : n. 镶嵌装饰,棋盘形布置,镶嵌式铺装
tiling : n. 盖瓦,铺瓷砖,瓦类,花砖
plane : n. 平面,飞机,水准;a. 平的,平面的,平坦的;vt. 将...刨平,刨平;vi. 翱翔,乘飞机旅行,刨
involve : vt. 包括,使陷于,潜心于,包围
rectangle : n. 长方形,矩形
gap : 门隙,缝隙;空隙;火花隙;间距,范围,区间,间隔;裂缝,裂口,缺口;放电器; 使产生裂缝,豁开
overlap : n. 重叠,重复;vt. 重叠,重复;vi. 迭盖
region : n. 区域,地方,地区,范围,区,领域,层
jigsaw : n. 竖锯;vt. 用竖锯锯
piece : n. 块,片,篇,碎片,部分;vt. 修补,修理,结合;vi. 接头
identical : a. 同一的,恒等的,完全相同的
primarily : ad. 主要地,首先地,基本地
polygon : n. 多角形,多边形
straight : n. 直线,直;a. 直的,笔直的,正直的,直接的,整齐的,连续的;ad. 直接地,立即,不断地
convex : a. 中凸的,凸圆的,凸面的;n. 凸状,凸面体,凸透镜
entirely : ad. 完全,全然,一概
properties : 道具
establish : vt. 建立,确立,制定;vi. 移植生长
obvious : a. 明显的,明白的,显然的
demonstrate : vt. 示范,证明;vi. 示威
equilateral : n. 等边形;a. 等边的
clear-cut : a. 轮廓清晰的,明白的,清楚的
hexagon : n. 六角形,六边形
ancient : a. 远古的,旧的
exploit : n. 功绩,勋绩;vt. 开发,利用,开拓,剥削
honeybee : n. 蜜蜂
honeycomb : n. 蜂巢,蜂房,蜂窝;a. 蜂巢的;vt. 开多孔使成蜂巢状;vi. 满是洞孔
quadrilateral : a. 四边形,四边地,四角地
devoid : a. 全无的,缺乏的
uncovered : a. 无遮盖的,未戴帽子的,未保险的
以上就是为大家整理的精选托福阅读词汇笔记(九)，希望能够帮助大家备考。前程百利祝大家都能取得理想的考试成绩。
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