英汉双语例句-生物医药大词典

Unfortunately, the solid propellants—usually aluminum fuel and ammonium perchlorate oxidizer—burn fairly inefficiently, are toxic to the environment, and are difficult to fabricate and handle safely.

中文意思：
然而固体推进剂（通常是铝燃料和过氯酸铵氧化剂）燃烧效率颇低、对环境有害，而且很难安全地制造和操作。

以下为相关句子列表(点击查看，可以看对应的解释）：

	Unfortunately, the more options you have and the more opportunity costs you incur, the more likely you are to experience regret.			不幸的是，选择越多，你要承担的机会成本就越高，也就越可能感到遗憾。
	Unfortunately, the more that one possesses, the harder it is to ascend.			遗憾地，一个人占有越多，提升就越艰难。
	Unfortunately, the non-American reader needs to know a little of the country's history to fully appreciate this book.			遗憾的是,为了能更好地赏读本书,美国之外的读者则需要了解一点儿该国的历史。
	Unfortunately, the procedure carries a mortality rate of at least 1 percent -- even in the hands of experienced surgeons.			但不幸的是，即使熟练的外科医生也会有至少1％的手术死亡率。
	Unfortunately, the results from the 1761 transit were not as good as expected: the measured values of the solar parallax ranged from 8.3 to 10.6 arc seconds.			不幸的是，1761年凌日得到的观测结果并不如预期的好：测量到的太阳视差範围是8.3~10.6角秒。
	Unfortunately, the solid propellants—usually aluminum fuel and ammonium perchlorate oxidizer—burn fairly inefficiently, are toxic to the environment, and are difficult to fabricate and handle safely.			然而固体推进剂（通常是铝燃料和过氯酸铵氧化剂）燃烧效率颇低、对环境有害，而且很难安全地制造和操作。
	Unfortunately, the special alternative should be performed for some cases, in order to the purpose of appropriate treatment.			在少数不得已的情况之下，必须采取特殊的替代方法，以遂行治疗过程顺利之目的。
	Unfortunately, the things people naturally try to do after a break up actually end up pushing their ex further away... even though it seems like the right thing to do at the time!			很不幸的是，分手后人们自然而然会做的事情恰恰是把前男/女友越推越远，尽管当时看起来是正确的！
	Unfortunately, the time has not yet rubber and plastics, the material is biodegradable, so future generations heirs.			可惜，那时还没有橡胶和塑料，用的都是可降解材料，所以后世不传。
	Unfortunately, the toilet was lost for more than 3000 years before being 4)reinvented in England during the sixteenth century.			不幸的是，马桶失传了三千多年，直到十六世纪时英国才再度发明它。
	Unfortunately, the young man discovers that his nemesis is now a powerful vampire with a coven of allies.			不幸地，年轻的男人发现他的复仇女神现在居然是女巫协会的一个强大的吸血鬼。