英汉双语例句-生物医药大词典

Since 1990, 2 randomized trials and several observational studies have evaluated the benefits vs risks of expectant management of severe preeclampsia at <34 weeks of gestation.

中文意思：
自1990年以来，2个随机试验和一些观察性研究评价了对于妊娠小于34周的重度先兆子痫采用保守治疗的利与弊。

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	Since 1989, the year Ronald Reagan, the American president most in tune with Mr Friedman's ideas, left office, and the Berlin Wall came down, America's government has grown just as fast as its economy—an economy which has barrelled along for much of that			1989年，随着与弗老理念最为一致的罗纳德·里根总统的离去，加之柏林墙的轰然倒下，美国政府的干预势头就几乎同它的经济增长一样快，而这些年来，美国经济大部分时间的增长十分强劲。
	Since 1990 [from-it's been] growing at about 20% per year.			根据有机食品联会的生产市场调查，我们估计18％的年增长率将保持到2008年。”
	Since 1990 it has been ascertained and accused of, the kgal base for which is the principle of the crime against humanityestablished in Tokyo and Nuremberg Trials.			90年代以来,人们从捍卫人权的角度对日本生化战争犯罪的追究和诉讼,从法理上其实是基于东京审判和纽伦堡审判中“对人道的犯罪”的原理。
	Since 1990's, because of recent recognition of potential global-scale interactions among climate, surface processes, tectonics, needs of engineering constructions and critical land-use decisions the theoretical problems of bedrock channel fluvial incision			自20世纪90年代以来，由于对全球尺度的气候、地表过程和构造之间相互作用的认识，以及工程建设和天然资源管理决策的需要，流水下切成为构造地貌学的理论研究前缘。
	Since 1990, 2 randomized trials and seeral obserational studies hae ealuated the benefits s risks of expectant management of seere preeclampsia at <34 weeks of gestation.			自1990年以来，2个随机试验和一些观察性研究评价了对于妊娠小于34周的重度先兆子痫采用保守治疗的利与弊。
	Since 1990, 2 randomized trials and several observational studies have evaluated the benefits vs risks of expectant management of severe preeclampsia at <34 weeks of gestation.			自1990年以来，2个随机试验和一些观察性研究评价了对于妊娠小于34周的重度先兆子痫采用保守治疗的利与弊。
	Since 1990, ecological water requirement of the river system has been estimated on the concept of ecologically acceptable flow regimes to maintain the integrity of ecosystem.			20世纪90年代后，提出了考虑河流生态系统可接受的流量变化，以维持河流生态系统整体功能为目标确定河流生态需水的研究思路。
	Since 1990, some have made the annual concert a part of their Memorial Day weekend.			从1990年开始，一些人已经把每年的演出当作纪念日周末活动的一部分了。
	Since 1990s of last century, China has fulfilled the transformation from unfavorable balance of trade into favorable balance of trade.			摘要20世纪90年代以来，我国实现了由贸易逆差向贸易顺差的转变。
	Since 1990s, we can see swans come to Summer Palace every year.			据了解，从20世纪90年代初开始，在颐和园每年都能看见“落脚”的白天鹅。
	Since 1991 observers have discovered some 120 exoplanets—worlds outside our solar system.			自1991年起，天文学家已在我们太阳系外的世界，发现了大约120个系外行星。