Word: explains
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Dates: during 1990-1999
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...Explain the difference between a citizen and an alien...
...name one who was simply handed a piece of paper saying, "You have AIDS," with no follow- up. Quanquilla Mason, a deaf and blind New Yorker who has since died, remembered going into emergency surgery. "I was afraid," recalled Mason, "and the surgeon wasn't making any effort to explain to me what he was doing, and I was asking, 'Please let my interpreter come, please let her come explain to me what you gonna do?!' " Although federal law vouchsafes a right to interpreters, financially strapped hospitals often slide by with a minimum of service. Deaf AIDS patients nationwide...
...This notion gained support in 1991, when British scientists reported that 58% of the postpolio patients they tested had high concentrations of polio-type antibodies not only in their blood, which is to be expected, but also in their spinal fluid, which suggests a current infection. That does not explain, however, why the disease resurfaces so long after the original infection, and attempts to replicate the British findings have been unsuccessful. Since it's possible that the dormant virus could mutate into active new forms, scientists are searching for such culprits...
Although there is no direct evidence to support the wear-and-tear theory, it does make a lot of sense. It would explain, for example, why so many people are coming down with postpolio syndrome now. The great postwar epidemic peaked in the U.S. in 1952, when more than 20,000 children were paralyzed by polio, and it tapered off in the early '60s, after the Salk vaccine and then the Sabin oral version were introduced. The first wave of postpolio symptoms appeared in the early 1980s, 30 years after the epidemic's peak, and if researchers are correct...
...instance, having chosen not to impose sanctions on China for its persistent violations of human rights, ranging from its treatment of Tibet to the torture and imprisonment of political dissidents, the Administration may find it hard to explain why it is acting now because of environmental wrongs. And at a time when the U.S. is trying to lower trade barriers, some members of the Administration argue that punitive sanctions against China or Taiwan will send the wrong message about U.S. commitment to free trade. A State Department official suggests that it's too soon for the U.S. to play...