The third, and most potent limitation is that it is not possible to be certain that the infant's response was due to the stimulus presented or to a change from no stimulus to a stimulus.
第三也是最有力的限制在于婴儿做出的是面对刺激的反应，还是从受到刺激到没受到刺激的变化，这是无法确认的。
Once this social graph, or map, is in place, it becomes a potent mechanism for spreading information.
这一社会图或社会地图一旦投入使用，它就能成为传播信息的有力途径。
I'm not surprised you haven't succeeded - irritation such as yours is a potent, chemical thing, and no amount of whipping oneself with birch sticks or platitudes from coaches is going to help.
对于你没能成功做到这一点，我并不感到惊讶——你的这种恼怒是一种强有力的化学物质，再多的自我鞭策、再多教练的陈词滥调都不会奏效。
Nature photography has become a potent tool in this struggle.
自然摄影在这场斗争中已经成为有力的工具。
Yet it turns out miraculously to have potent immunosuppressive properties that allow doctors to successfully perform a liver transplant in a young girl.
但奇迹的是，正因为它强有力的抗免疫特性，医生们得以成功地为一位小女孩进行肝移植手术。
And he's been a character that the Disney Corp. dare not tamper with: a potent corporate symbol of the Disney enterprise, and a perfect example of both cultural phenomenon and commercial success.
迪士尼集团一直也不敢损害这一角色：因为他不仅是迪士尼公司一个强有力的标志，也是文化现象和商业成功的一大典型案例。
Last year a group at the University of Minnesota found a way to guide into human embryonic stem cells into becoming a potent type of white blood cell which destroys tumour cells.
去年，美国明尼苏达大学的研究小组找到了一种办法，把人类胚胎干细胞引导成一种强有力的白细胞，这种白细胞会破坏肿瘤细胞。
Van Wolferen identifies the mushroom cloud as a potent postwar symbol of Japan as victim, perhaps even the ultimate victim: a baptism by fire that erases all guilt of previous Japanese aggression.
范沃尔·弗伦指出，蘑菇云成了战后日本作为受害者的强有力的标志，甚至可能是最终的受害者：经过火的洗礼，日本人侵略别国的罪恶都被荡涤一空了。
He is very good at identifying the potent elementary fact.
他很擅长识别那些有力然而也是很基本的事实。
He says this stigmatization will act as a potent deterrent to their use.
他说，这种遣责将对集束弹的使用形成强有力的威摄作用。
Ledra Street, a thoroughfare in the heart of Nicosia had become a potent symbol of Cyprus's ethnic partition.
尼科西亚市中心地带的莱德拉大道一直是塞浦路斯种族分离的有力象征。
Other research shows that frozen methane (a potent greenhouse gas) may bubble up out of the melting Siberian permafrost in volumes that would raise global temperatures by several degrees.
其它研究显示，冻结的甲烷(一种强有力的温室气体)也许会从融化的西伯利亚永冻土中大量喷涌而出，将全球气温提高几度。
America has a potent new weapon.
美国拥有了一种有力的新武器。
The Internet is often dismissed as awash with cranks, but it has proved far more potent at debunking conspiracy theories than perpetuating them.
人们通常认为互联网上充斥着怪人，不值一提，但是如今它已成为揭露而非单单记载阴谋的最有力的基地。
But its distinctive white shawls remain a potent symbol of the quest for justice in Latin America.
但是在拉美，该组织独特的白围巾却一直是追求公正的有力象征。
Glass represents how an even more potent challenge has arrived: sophisticated, capital-intensive businesses that boast high-tech expertise.
玻璃代表着一次更强有力的挑战到来：这桩复杂又耗钱的生意可是宣称具有高科技含量的。
Adding these services to one's repertoire offers yet another potent opportunity for generating extra cash.
给自己的技能列表里添加这些服务，将会给自己创造又一有力的赚取外快的机会。
Scottish chemist Joseph Black discovered and isolated this potent greenhouse gas in the 1750s.
1750年代，苏格兰化学家约瑟夫·布莱克发现并分离了这种强有力的温室气体。
Elderberry juice, tea or syrup are potent and can help knock out flu symptoms.
接骨木果汁，茶或糖浆是防治流感症状的有力饮品。
Beauty is potent; but money is omnipotent.
美丽是有力量的，但金钱更有权威。
You can judge the effectiveness of a US bill by its length: the shorter it is, the more potent it will be.
您可以从一份美国法案的长度来判断其有效性：越简短就越有力。
Still, Mr Perino's book is potent testimony to the way in which one person can help crystallise the interpretation of an event.
但佩里诺的书有力地证明了在对一个事件的诠释的过程中，一个人是如何凭一己之力使对事件的诠释清晰且固定下来。
Still, Mr Perino's book is potent testimony to the way in which one person can help crystallise the interpretation of an event.
但佩里诺的书有力地证明了在对一个事件的诠释的过程中，一个人是如何凭一己之力使对事件的诠释清晰且固定下来。
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