externala.外部的；外国的n.外部；外面
Further evidence for persistent internal rhythms appears when the usual external cycles areshifted-either experimentally or by rapid east-west travel over great distances.（TPO）当 常规外部循环被转移了——要么是实验性的或者是快速东西向远距离转移，这时候持续的内部节律存在的证据就出现了。
internal a.内在的；国内的
用：wrestling with internal doubts疑虑重重；心神不定
例：Biologists accept the idea that all eukaryotes have internal clocks.（TPO）生物学家们都认可这个观点——所有的真核细胞都有内在的生物钟。
conclude v.结束；得出结论
派：conclusion n.结论；结局；推论
例：Some current analyses conclude that volcanoes and solar activity explain quite aconsiderable amount of the observed variability in the period from the seventeenth to theearly twentieth centuries.（TPO）目前一些分析推断，火山和太阳的活动解释了从17世纪到20世纪早期这段时间相当大一部分被观测到的变化。
exclude v.排除
用：exclusive a.高级的；独有的；排他的n.独家新闻
例：The judge decided to exclude evidence which had been unfairly attained.法官决定把用不正当手段获取的证据排除在外。
include v.包含；包括
用：include sb/sth（in/among sth）使某人／某事物成为（整体中）的一部分
例：These courses include areas like history,literature.mathematics and science.这些课程包括历史、文学、数学和科学。
exhibit v.展出；陈列
例：All exhibited moderate growth rates in the course of the century,but all more than doubledin population by 1900.（TPO）这一切都显示了在这个世纪里平稳的增长速度，但是人口总量却是1900年的两倍多。
prohibit v.禁止；阻止
用：prohibit sb from doing sth禁止某人做某事
例：We should strictly prohibit people from smoking in public.我们应当严格禁止人们在公共场所吸烟。
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