Polystyrene - supported N - benzyl - N - alkyl - aminopyridine was prepared through chloromethylated polystyrene treated with 4 - aminopyridine and alkylation agents.本文以聚苯乙烯氯球为原料,通过与 4- 氨基吡啶及烷基化试剂反应,制成聚苯乙烯支载N - 烷基-N-苄基氨基...
Secret investigations have netted ninety staff suspected of fraud and theft.秘密调查已抓获90名涉嫌欺诈盗窃的职员。The anti-drug sweep had netted nearly 900 kilogrammes of cocaine.扫毒行动已缴获了近900千克的可卡因。The fish put up a spectacular 20 minute ...
I dropped a quarter into the slot of the pay phone.我向付费电话的投币孔里投了一枚25分硬币。Next time use a pay phone and call me.下次,用公用电话给我打电话.I tried to find a pay phone, but the receiver broke down.我想找个投币电话的, 但是话筒坏掉了....
Ribose and deoxyribose are constituents of the nucleic acids RNA and DNA.核糖与脱氧核糖分别是核糖核酸与脱氧核酸(DNA)的结构成分.The sugar in all the nucleotides of DNA is deoxyribose.所有DNA的核苷酸中的糖均是脱氧核糖.Deoxyribose A pentose ( five - carbon ) sug...
少焉, 月出于东山之上.After a little while , the moon lifted itself above the eastern hills.不入虎穴,焉得虎子?How can you catch tiger cubs without entering the tiger's lair?不入虎穴,焉得虎子.Nothing venture, nothing have....
这些艰难困苦教会了冰岛人“知足常乐”.They have taught Icelanders to enjoy what they have.大多数冰岛人年轻时都要到国外去旅行.Most Icelanders travel out into the world as young adults.冰岛人过生日常吃带蜜饯的薄饼.Icelanders with candied fruit ate the birthday of the patt...
The severe storm did for most of the crops.猛烈的暴风雨毁掉了大部分庄稼。As is often the case with orchards, cool - season crops sometimes need frost prevention by smudging.象通常在果园防霜那样, 寒季作物有时也需要烟熏防霜.If the biennial cycle is broken for ...
To explore a new means for axial eye length measurements when vitreous turbidity in intercurrent cataract.目的:探索并发性白内障玻璃体混浊时准确测量眼轴的新方法.This effectively means that the government does not agree with the proposals...这实际上就意味...