38.Some geologists,however,on the basis of observations concerningmantle xenoliths,argue that the mantle is not layered,but thatheterogeneity is created by fluids rich in incompatible elementspercolatingupward and transforming portions of the uppermantle irregularly,according to the vagaries of the fluids pathways.
但是,某些地质学家,以对地幔捕虏岩体所作的观察为依据,指出地幔并非是分层排列的,相反,地幔的异质性是由那些富含不相容成分的流质构成的,这些成分趋向于流体而非固体的状态,自下而上渗透扩散,并依照这些流质流向的任意性,不规则地将上部地幔的某些部分予以改变。
39.The very richness and complexity of the meaningful relationshipsthat kept presenting and rearranging themselves on all levels,fromabstract intelligence to profound dreamy feelings, made it difficultfor Proust to set them out coherently.
各种有意义的联系在所有的层次上,自抽象的理性至深刻的梦幻般的情感,层出不穷并不断重新组合排列;正是这些有意义的联系的丰富性和复杂性,致使普鲁斯特难于将它们错落有致地安排好。
40.It is possible to make specific complementary DNAsthat can serve as molecular probes to seek out the messengerRNAs of the peptide hormones. If brain cells are making thehormones,the cells will contain these MrnaS. If the products the braincells make resemble the hormones but are not identical to them,then thecDNAs should still bind to these mRNAs,but should not bind astightly as they would to mRNAs for the true hormones.
科学家可以制造出特异的互补DNAs,以此作为分子探子,探觅出肽激素的信使RNAs。如果大脑正在制造着肽激素,则细胞就会含有这些信使RNAs.假若细胞所制造的产品类似于肽激素但并非与这些肽激素全然相同,那么,互补cDNAs应仍然和这些信使mDNAs粘结的程度。含有这些mRNAs的脑细胞然后就可以被分离开来,研究者可对其信使RNAs进行解码,以确定它们的蛋白质产品究竟是什么,并确定这些蛋白质产品在何种程度上类似于真正的肽激素。
41.The molecular approach to detecting peptide hormones using cDNAprobes should also be much faster than the immunological method becauseit can take years of tedious purifications to isolate peptide hormonesand then develop antiserums to them.
采用cDNA探子来测定肽激素的这一分子生物学方法同时也应该比免疫学的方法速度来得快,因为对于免疫的方法来说,需耗费好几年枯燥的提纯进程,方能将肽素分离了出来,然后再培养出针对它们的抗血清。
42.This succession was based primarily on a series of deposits andevents not directly related to glacial and interglacialperiods,rather than on the more usual modern method of studyingbiological remains found in interglacial beds themselvesinterstratified within glacial deposits.
这一序列演替所依据的,主要是一系列与冰川期和间冰期并不直接相关的地质沉积物和地质事件,而不是依据更为普遍的现代方法,去研究间冰层中所发现的生物残留物,而这些间冰层本身又在冰川沉积物发生间层化。
上一篇: GRE阅读,培养良好的阅读习惯是关键
下一篇: GRE阅读五个境界全面突破
国际英语资讯:White House says it prepares for govt shutdown
吃鸡块还能当职业!吃货的福利来了
国际英语资讯:May, Macron agree measures to deepen ties between Britain, France
国际英语资讯:Macron, Merkel show unity to push eurozone reforms
床单应该多久洗一次?让科学家来告诉你
国际英语资讯:News Analysis: Make or break for NAFTA at next weeks talks in Canada
内蒙古太仆寺旗宝昌一中2017-2018学年高二上学期期末考试英语试卷
体坛英语资讯:Chinas Zhu Lin suffers nail-biting defeat in round 1 of the Australian Open
库克回应苹果降速门:下次系统更新允许禁用iPhone降频
国际英语资讯:Feature: Orthopedic center in Afghanistan helps war victims find feet again
你做过什么最勇敢的事?
2017全国美食消费报告出炉,大家最爱吃这个菜!
内蒙古太仆寺旗宝昌一中2017-2018学年高一上学期期末考试英语试卷
乔治小王子被欺压?在家完全是妹妹说了算
黑利:巴勒斯坦不认真对待和平进程
国际英语资讯:Indonesia looks to China to help boost slumping tourism in wake of Bali volcano eruptions: o
国际英语资讯:Tillerson to make his European tour amid rising rift over Iran nuclear deal
国际英语资讯:EU-China Tourism Year 2018 opens with official ceremony in Venice
国内英语资讯:China to hold governments, officials at provincial level accountable for farmland protection
国际英语资讯:Japanese, Australian PMs pledge to enhance security, economic cooperation
体坛英语资讯:Namibias tactics gradually taking shape ahead of clash against Uganda - Coach
The Best Way to Learn 学习的最好方法
国际英语资讯:City of London eager to be involved in Belt and Road: lord mayor
库克回应苹果降速门:下次系统更新允许禁用iPhone降频
中国建造世界最大空气净化站,老外纷纷称赞!
Shot themselves in the foot?
哈里王子的婚礼不会邀请川普,原因竟是
“熊”出没注意!《帕丁顿熊2》口碑爆棚,打破烂番茄连鲜纪录
英国女王吐槽王冠太重:别低头,脖子会断
For the Goal 为了实现目标