4周搞定2000+托福核心词
census = cens(判断) + us(表名词) = 查[人口]→普查
cumulus = cumul(堆积) + us(表名词) = 积云
地峡
isthmus
常考释义
North and South American species migrating across the Isthmus now came into competition with each other.
南、北美洲的物种可以穿越地峡而相互竞争。
来源于：阅读OFFICIAL29 P2n. 地峡；管峡
It was the neck of land which we call the Isthmus of Panama.
这个陆地的狭窄地带，我们称之为巴拿马地峡。
North and South American species migrating across the Isthmus now came into competition with each other.
南、北美洲的物种可以穿越地峡而相互竞争。
来源于：阅读OFFICIAL29 P2In the 1980s, John Graves studied two populations of closely related fishes, one population from the Atlantic side of isthmus, the other from the Pacific side.
20 世纪80年代，约翰•格雷夫斯研究了两个紧密相关的鱼种，一种来自地峡的大西洋一侧，另一种来自太平洋那一侧。
来源于：阅读OFFICIAL31 P1This is significant because Pacific seawater if typically 2 to 3 degrees cooler than seawater on the Atlantic side of isthmus.
这个发现很重要，因为太平洋的海水的水温通常要比地峡另一侧大西洋的海水低2到3度。
来源于：阅读OFFICIAL31 P1Similarly, a creeping glacier may gradually divide a population, or a land bridge such as the Isthmus of Panama may form and separate the marine life in the ocean waters on either side.
类似地，慢慢移动的冰川可能会逐渐将一个种群分开，或者形成像巴拿马地峡这样的大陆桥，将海洋生物隔离在大陆桥的两边水域。
来源于：阅读OFFICIAL42 P1About 5 million years ago such geologic movements created the land bridge between North America and South America that we call the Isthmus of Panama .
大约五百万年前这种地质运动形成了连接北美和南美的大陆桥，也就是我们今天所说的巴拿马地峡。
来源于：阅读OFFICIAL31 P1['ɪsməs]
基本释义 n. 地峡
常考释义 n.地峡；管峡
It was the neck of land which we call the Isthmus of Panama.
这个陆地的狭窄地带，我们称之为巴拿马地峡。
census n. 人口普查
cens判断+us表名词 =查[人口]→普查
cumulus n.积云【气】
cumul堆积+us名词 =积云
prospectus n. 内容说明书
pro前+spect看+us表名词 =向前看的东西→内容说明书，计划书
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