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specialized-specialize
v.专攻；专门从事
specialization
n.特长；专门化
specially
adv.特别地
Public performance is a manner of communication that is highly specialized with its own techniques for obtaining effects by voice and or gesture.
公开的行为表现是一种交流方式，我们通常会通过声音或手势来获取注意力。
readily
adv.容易地；乐意地
Exhibitors, however, wanted to maximize their profits, which they could do more readily by projecting a handful of films to hundreds of customers at a time
然而，电影放映者们期望将自己的收益最大化，他们希望能更简易地将少量电影同时放映给几百个顾客
(rather than one at a time) and by charging 25 to 50 cents admission.
（而不是每次为一个顾客播放一次电影），每次收费25到50 美分。
potential
adj.有潜力的, 潜在的
potentially
adv.潜在地
One potential problem is that opening the mouth to breathe detracts from the streamlining of these fishes and tends to slow them down.
一个潜在的问题是打开嘴呼吸的流线型的影响，这些鱼趋于缓慢下来。
migration
n.迁移
migrate
v.迁移
migratory
adj.迁移的
immigration
n.外来的移民
Later Heyerdahl suggested that the Pacific was peopled by three migrations:
后来Heyerdahl表明太平洋人来自三个移民群体：
by Native Americans from the Pacific Northwest of North America drifting to Hawaii, by Peruvians drifting to Easter Island, and by Melanesians.
从北美洲西北部太平洋地区漂流到夏威夷的美国本土居民，从秘鲁去往复活节岛的漂流者，还有美拉尼西亚人。
masks-mask
n.遮蔽物；伪装 v.掩饰
headmask
n.英国中小学校长
Performers may wear costumes and masks to represent the mythical characters or supernatural forces in the rituals or in accompanying celebrations.
在这种仪式或伴随的庆典中，表演者们可能会穿上戏装戴上面具来扮演神秘的角色或超自然力量。
habitats-habitat
n.栖息地，居留地
Human landscapes of lawns, fields, or flowerbeds provide settings with bare soil and a lack of competitors that are perfect habitats for colonization by opportunists.
人工草坪、田地或花圃提供的光秃秃的土地，以及没有竞争者的环境是“机会主义者”完美的栖息地。
fundamental
n.基本原则adj.基本的；重要的
Such a perspective fundamentally changes our view of biological evolution.
这种观点从根本上改变了我们对生物进化的看法。
cycle
n.周期；循环 v.循环
If their population is tracked through time, it will be seen to be particularly unstable—soaring and plummeting in irregular cycles.
如果人口按时间进行跟踪，那么就会十分不稳定，人口正在无规则地升高和降低。
cattle
n.牛; 牲口
This region has a semiarid climate, and for 50 years after its settlement, it supported a low-intensity agricultural economy of cattle ranching and wheat farming.
这里有着半干旱的气候，在人们定居50年后，它支撑了一个以畜牧业和小麦种植为主的低密度农业经济。
california
n.加州
Most were in Denmark (which got 3 percent of its electricity from wind turbines) and California
多数在丹麦（风能发电占3%），以及加州
(where 17,000 machines produced 1 percent of the state's electricity, enough to meet the residential needs of a city as large as San Francisco).
（1.7万台机器为加州产能1%，足以满足像旧金山等大城市的居民需求）。
brief
adj.简短的n.摘要；简报v.摘要
The process perceived by these anthropologists may be summarized briefly.
这些人类学家们推论过程可简要概括。
avoid
v.躲开, 避开
This enables them to avoid the worst rigors of high winds and permits them to make use of the higher temperatures immediately adjacent to the ground surface.
这种特点使它们得以免受恶劣强风的侵袭，并有助于它们利用地面附近的较高温度。
accurate
adj.精确的；正确的
Ekman argued that the ability to accurately recognize the emotional content of facial expressions was valuable for human beings.
艾克曼认为，能够准确认知面部表情对人类而言非常重要。
vitamins-vitamin
n.维生素
Almost daily the public is besieged by claims for "no-aging" diets, new vitamins, and other wonder foods.
大众几乎天天渲染“不老”饮食，新维他命以及其它神奇食物。
timberline
n.树带界线
timber
n.木材
There is still no universally agreed-on explanation for why there should be such a dramatic cessation of tree growth at the upper timberline.
目前还没有一个普遍认同的解释来说明为什么会在树带界线上出现树木停止生长这种戏剧化的现象。
pueblos-pueblo
n.印第安人村庄
Then, to connect the pueblos and to give access to the surrounding tableland,
为了连接印第安人村庄和周边高原，
the architects laid out a system of public roads with stone staircases for ascending cliff faces.
建筑师建造了一种道路系统，石子楼梯可供人们攀登上崖面。
pollutants-pollutant
n.污染物质
polluted-pollute
v.污染, 弄脏
With a moderate to fairly high net energy yield, these systems emit no heat-trapping carbon dioxide or other air pollutants and need no water for cooling;
对相当高纯的能量产额具有一种稳定性的情况下，
manufacturing them produces little water pollution.
这些系统不散发吸热的二氧化碳或者其他空气污染物，无需冷却水。
