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interact
vi.互相作用，互相影响
When all these shaping forces-schools, open attitudes, the premium system, a genius for spatial thinking-interacted with one another on the rich U. S. mainland, they produced that American characteristic, emulation.
当所有这些决定性的因素--学校、开明的态度、奖励制度、立体思维的天赋--共同作用于美国这块富饶的土地上时，就产生了这种美国特色：竞争。
intervene
vi.干涉，干预；干扰，阻挠
The superpower country likes to intervene in the internal affairs of other countries.
那个超级大国总是把干涉别国内政当作一种乐趣。
A week intervenes between Christmas and New Year's Day.
圣诞节和元旦相隔一周。
I shall come if nothing intervenes.
如果没有别的事，我就来。
junction
连n.接点，（道路等的）会合点，枢纽
The hydro-power station stands at the junction of two rivers.
水力发电站位于两条河流的汇合处。
mediate
vi.（in, between）调解，斡旋 vt. 经调解解决
The Union played an important role in mediating a settlement between the labor and management.
工会在劳资双方间通过调停达成和解中起了重要作用。
The minister of foreign affairs mediated between two warring countries.
外长在两个交战国之间进行积极的斡旋。
negligible
a.可以忽略不计的，微不足道的
Some people's knowledge of English is negligible.
有些人的英语水平让人不敢恭维。
H2O, CO2 from the atmosphere can have complicated effects on the electrical conductivity, which is not negligible.
大气中的H2O、CO2会对电导率产生复杂的影响， 这是不容忽视的。
originate
vi.（in, from, with）起源于，来自，产生 vt. 创造，创始，开创
Just as Mao Zedong puts it, "All theories originate from/in practice and in turn serve practice. "
正如毛泽东所说："任何理论都来源于实践，反过来又为实践服务。"
The film originated in/from a short story.
这部电影取材于一篇短篇小说。
The use of steam originated many other reforms.
蒸汽的使用引起了许多其他改革。
periodical
n.期刊 a. 周期的，定期的，时而发生的
All of us, especially the aged, should receive periodical health check-ups.
我们大家，尤其是老年人，应该接受定期体检。
predominant
a.占主导地位的，显著的
Sunny days are predominant over rainy days in desert regions.
在沙漠地带，下雨天少得可怜，绝大多数日子是艳阳高照。
proclaim
vt.宣告，宣布，声明；显示
In Britain, one's accent proclaims his social status.
在英国，一个人的口音显示他所处的社会地位。
After its independence China was proclaimed a republic.
中国独立之后宣布成立共和国。
retort
v. /n.反驳，回嘴
"It's none of your business, " he retorted. "
你管不着！"他反驳道。
seemingly
ad.表面上，看上去
Seemingly there is nothing we can do.
看来我们帮不上忙。
stationary
a.固定的，静止不动的
Don't get off the bus until it is stationary.
等公共汽车停稳了再下车。
superiority
n.优越（性），优等
The official always has a sense of superiority, as he often assumes an air of superiority before others.
这个当官的总有那么一种优越感，老在别人面前摆架子。
Man has an intellectual superiority over all the other animals.
在智力方面，任何动物都比不上人。
threshold
n.门槛；入门；起点；最低限度
The sound was so loud it was on the threshold of pain.
声音大得开始使人无法忍受（超过了最低限度）。
turbulent
a.动荡的，混乱的；汹涌的，狂暴的
There still exist turbulent, revolutionary undercurrents in this seemingly peaceful world.
在这个表面上和平的世界里，骚乱与动荡的潜流依然存在。
underlying
a.含蓄的，潜在的
It's the economist's mission to try to find out the underlying causes of the depression.
努力探索出造成经济衰退的潜在原因是经济学家的任务。
