1.The very richness and complexity of the meaningful relationships that kept presenting and rearranging themselves on all levels，from abstract intelligence to profound dreamy feelings，made it difficult for Proust to set them out coherently.
2.It is possible to make specific complementary DNA’s (cDNA’s)that can serve as molecular probes to seek out the messenger RNA’s (mRNA’s)of the peptide hormones. If brain cells are making the hormones，the cells will contain these Mrna’S. If the products the brain cells make resemble the hormones but are not identical to them，then the cDNA’s should still bind to these mRNA’s，but should not bind as tightly as they would to mRNA’s for the true hormones.
3.The molecular approach to detecting peptide hormones using cDNA probes should also be much faster than the immunological method because it can take years of tedious purifications to isolate peptide hormones and then develop antiserums to them.
4.This succession was based primarily on a series of deposits and events not directly related to glacial and interglacial periods，rather than on the more usual modern method of studying biological remains found in interglacial beds themselves interstratified within glacial deposits.
5.There have been attempts to explain these taboos in terms of inappropriate social relationships either between those who are involved and those who are not simultaneously involved in the satisfaction of a bodily need，or between those already satiated and those who appear to be shamelessly gorging.
6.Many critics of Family Bronte’s novel Wuthering Heights see its second part as a counterpoint that comments on，if it does not reverse，the first part，where a "romantic" reading receives more confirmation.
7.Granted that the presence of these elements need not argue an authorial awareness of novelistic construction comparable to that of Henry James， their presence does encourage attempts to unify the novel’s heterogeneous parts.
8.This is not because such an interpretation necessarily stiffens into a thesis(although rigidity in any interpretation of this or of any novel is always a danger)，but because Wuthering Heights has recalcitrant elements of undeniable power that，ultimately，resist inclusion in an all-encompassing interpretation.
9.The isotopic composition of lead often varies from one source of common copper ore to another，with variations exceeding the measurement error;and preliminary studies indicate
virtually uniform is topic composition of the lead from a single copper-ore source.
10. More probable is bird transport，either externally，by accidental attachment of the seeds to feathers，or internally，by the swallowing of fruit and subsequent excretion of the seeds.
11.It is not known how rare this resemblance is，or whether it is most often seen in inclusions of silicates such as garnet，whose crystallography is generally somewhat similar to that of diamond; but when present，the resemblance is regarded as compelling evidence that the diamonds and inclusions are truly cogenetic.
12.Even the "radical" critiques of this mainstream research model，such as the critique developed in Divided Society，attach the issue of ethnic assimilation too mechanically to factors of economic and social mobility and are thus unable to illuminate the cultural subordination of Puerto Ricans as a colonial minority.
13.They are called virtual particles in order to distinguish them from real particles，whose lifetimes are not constrained in the same way，and which can be detected.
14. Other theorists propose that the Moon was ripped out of the Earth’s rocky mantle by the Earth’s collision with another large celestial body after much of the Earth’s iron fell to its core.
15.Thus，what in contrast to the Puritan colonies appears to Davis to be peculiarly Southern— acquisitiveness，a strong interest in politics and the law，and a tendency to cultivate metropolitan cultural models—was not only more typically English than the cultural patterns exhibited by Puritan Massachusetts and Connecticut，but also almost certainly characteristic of most other early modern British colonies from Barbados north to Rhode Island and New Hampshire.
16.A very specialized feeding adaptation in zooplankton is that of the tadpolelike appendicularian who lives in a walnut-sized (or smaller) balloon of mucus equipped with filters that capture and concentrate phytoplankton.
17.These historians，however，have analyzed less fully the development of specifically feminist ideas and activities during the same period.
18.When the core of a giant star whose mass surpasses 1.4 times the present mass of our Sun exhausts its nuclear fuel，it is unable to support its own weight and collapses into a tiny neutron star.
19.This is so even though the armed forces operate in an ethos of institutional change oriented toward occupational equality and under the federal sanction of equal pay for
equal equal work.
20.Not only are liver transplants never rejected，but they even induce a state of donor-specific unresponsiveness in which subsequent transplants of other organs，such as skin，from that donor are accepted permanently