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The affected chicks acquired the morphine conditioned place preference more quickly, and maintained it much longer. Experiment 3 showed that during E5-8, injecting delta receptor antagonist naltrindole reversed the learning and memory impairment caused by morphine while delta receptor agonist DPDPE impaired learning and partial memory function. On the other hand, mu opioid receptors had little effect. As for E17-20, given naloxonazine can reverse the increases of susceptibility to morphine, and the mu receptor agonist DAGO cause the increases of susceptibility to morphine. Delta receptors have no effect.

研究结果发现：经过对鸡胚发育不同时间段的吗啡给药，胚胎期发育E5-8阶段给予吗啡的小鸡学习记忆受损最为严重，表现为学习和记忆功能的严重下降；而E17-20时段吗啡给药的小鸡更容易获得吗啡CPP且保持时间更长。E5-8阶段给予delta受体拮抗剂natrindole能够翻转吗啡对学习和记忆的损害作用，并且给予delta受体激动剂DPDPE也损害学习和部分记忆功能，mu受体作用不大。E17-20阶段拮抗mu受体能够抑制成瘾易感性的增加，激动mu受体可以增加小鸡的成瘾易感性，delta受体没有明显作用。

Since that trip I have maintained a daredevil's sense of adventure both at home and abroad.

那次旅行之后的每一次历险，无论是在家里还是在国外，我始终维持一种勇敢者的心态，积极去面对。

This is the website maintained by Department of Anthropology in the Dartmouth College.

这是达特茅斯大学人类学系创建的网站。

The results indicate that the operational cost at DO of 0.9mgL is the lowest,which has great diversity compared with the conventional view that DO level should be maintained above 2mgL.The assumption that the decay rate constant Kd is not affected by DO is not rational either.

结果表明，DO为0.9mgL时所需运行费用最少，这与主张应当维持DO浓度大于2mgL的传统观点相比相差甚远衰减速率常数Kd不受DO影响的假设也不合理。

The patient did not have any signs of hepatic decompensation and maintained a normal coagulation profile.

该患者没有任何肝脏失代偿的标志，凝血检查持续维持正常。

He failed again and again simply because he had maintained his defeatist attitude.

他一直 失败主义的，失败了一次又一次

A high lake level maintained during this period due to a southward migration of westerlies and a less evaporation;(6) the last deglaciation from about 15～10kaBP.

在57-32kaBP阶段的早期和晚期中甸纳帕海出现气温升高，且晚期比早期升温强烈，中间阶段气温下降，完全可以与古里雅冰芯记录对比。

The temperature within the jar should be maintained around seventy to seventy-five degree Fahrenheit.

温度范围内罐应保持在第七十一至75摄氏度。

Deism maintained that a rational view of the universe and of man is that God exists, that He created the universe, that the universe is governed by laws inherent in its structure, and that these laws do not permit the departure from them which is seemingly implied in miracles and the Christian revelation.

自然神论主张理性看待宇宙和人是神的存在，他创造宇宙，宇宙是由法律所固有的结构，而这些法律不允许他们离开似乎是在暗示奇迹和基督教的启示。

But the reality is, we have maintained our yields and we have improved the consistency of deliverable product.

但现实是，我们已经保持了产量，我们已经改进了可交付产品的一致性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。