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strength
n.力,力量
strengthened
adj.被加强的
Unchanging physical laws have limited the size and strength of buildings that can be made with materials discovered long ago.
因物理定律恒定不变，许多早已被发现的建筑材料限制了建筑的大小和有点。
scholars-scholar
n.学者
In addition to exploring the possible antecedents of theater, scholars have also theorized about the motives that led people to develop theater.
为了进一步探寻戏剧的起源，一些学派开始从人类发展戏剧的动机上建立理论。
rent
n.租金 v.租用
rental
n.租金; 租赁
Rent control is the system whereby the local government tells building owners how much they can charge their tenants in rent.
房租管制是指当地政府为业主的房租价格进行限定。
properties-property
n.财产, 性质
Making fine-art objects stable requires an understanding of the properties of mass, 143 weight, distribution, and stress.
使一部艺术作品呈现效果明显，要求对作画过程中的质量、轻重、分布及着重点有很好的理解.
practical
adj.实际的, 实用性的
Architecture is the art and science of designing structures that organize and enclose space for practical and symbolic purposes.
建筑是一门设计构造物的艺术和科学，该学科对空间进行组织规划和分割封闭，以达到实用性和象征性兼备的目的.
photographs-photograph
n.照片
photography
n.摄影, 摄影术
photographic
adj.照相的
A detailed study has been made of the prints using photogrammetry, a technique for obtaining measurements through photographs,
已经使用照相测量法(一种通过照相获得测量数据的技术)对这些脚印进行了一项详细的研究，
which created a drawing showing all the curves and contours of the prints.
这种方法产生了一张显示脚印所有曲线和轮廓的照片。
performed-perform
v.履行; 完成
performers-performer
n.表演者
Rather, their special properties will make possible investigations that will complement those performed with light-and electron-based instruments.
而且，他们的特殊性可使可能的辅助调查以灯光及电控工具的形式展现。
motion
n.运动; 动作
Feeding, courtship, reproduction, and even "rest" are carried out while in constant motion.
它们的进食，求偶，繁殖，甚至“休息”都在不断的运动中进行。
minor
adj.较小的
Once an oak tree becomes established, it is likely to survive minor cycles of drought and even fire.
一旦橡树长成，在短周期的干旱甚至火灾中它都能够轻易存活。
machinery
n.机器, 结构
After 1815 this older form of manufacturing began to give way to factories with machinery tended by unskilled or semiskilled laborers.
1815年以后，这种古老的生产模式逐渐消失，雇佣没有技术或半技术劳动者的机械化工厂开始兴起。
crystals-crystal
n.水晶
crystalline
adj.水晶的, 结晶性的
In effect, as molten glass cools, it progressively stiffens until rigid,
随着熔融态玻璃冷却，之后逐渐变硬，
but does so without setting up a network of interlocking crystals customarily associated with that process.
但这一过程并没有形成通常意义上的水晶网。
canal
n.运河；水道
The participation of state governments in railroad, canal, and turnpike construction.
政府对铁路、运河以及高速路建设的参与
loose
v.放松；释放 adj.宽松的
Water is stored underground in beds of loose sand and gravel or in cemented sediment.
水源在地下散沙和砾石，或沉积物中储存。
profit
n.利润, 利益 v.有益
profitable
adj.有利润的, 赚钱的
This law was intended to provide land for small farmers and to prevent land from being bought for resale at a profit or being owned by large landholders.
此法旨在为小农提供土地，禁止土地再买卖或被大地主所拥有。
internal
n.本质, 本性 adj.内在的
If Jupiter had had more mass, it would have developed internal nuclear reactions.
如果木星的质量更大些，内部核反应将应运而生。
inhabitants-inhabitant
n.居民; 居住者
inhabited-inhabit
v.居住于, 栖息
"Urban population" was defined as persons living in towns of 8,000 inhabitants or more .
“城市人口”的定义为8000或以上城镇人口。
But after 1900 it meant persons living in incorporated places having 2,500 or more inhabitants.
但从1900年以后，它的定义发展成2500或以上人口的组合地区。
ideal
n.理想；典范 adj.理想的
It was, therefore, an ideal technique for emphasizing the hard linear edges and pure, fine areas of color that were so much a part of the overall aesthetic of the time.
因此，在强调当时属于总体美学的一部分的坚硬的线性边缘和纯洁美丽的颜色方面，它是一项理想的技术。
