查询词典 four-sided

Cephalotaxine ester of 2-oxo-6-methylheptanoic acid was treated with lithium diisopropylamide and Me O-(1-methoxyisopropyl)glycolate to give a mixture of homoisoharringtonine and its stereoisomers with 56% yield. The four stereoisomers separated by TLC showed identical mass spectra and almost superimposed IR but with different 1H NMR spectra. The configuration of the 2'-C and 3'-C of the four isomers were postulated based upon their 1H NMR spectra as compared with the 1H NMR spectra of isoharringtonine and its stereoisomers.

2-氧代-6-甲基庚酰基三尖杉碱(3)与0-(1-甲氧基异丙基)羟基乙酸甲酯(4)在强碱性试剂二异丙胺锂存在下，起亲核加成反应，反应中间体5在室温用酸性丙酮水解，得到一种新的三尖杉酯类生物碱一一高异三尖杉酯碱(6c)及其立体异构体(6a、6b、6d)的混合物，产率56%、通过制备薄层层析分得这四个立体异构体，它们的1H NMR和异三尖杉酯碱及其立体异构体的1H NMR类似，推定了它们的绝对构型。

Graph coloring problem, you can use four kinds of colors to a different places on the map with different colors, and no more than four colors.

详细说明：图的着色问题，可以使用四种颜色给一个地图上的不同地方着上不同的颜色，并且不超过四种颜色。

The Dervise, absolutely persuaded(3) that four men, coming from four several directions, could not all be deceived, verily believed that the grazier who had sold him the sheep was a conjurer, and had bewitched his sight; inasmuch that, no longer giving credit to his Own eyes,(4) he began to be firmly convinced that the sheep he was leading was a dog.

托钵僧因为绝对相信四个来自不同方向的人不可能全都搞错了，就确实认为那个卖这头羊给他的牧人是个魔术师，迷了他的眼，于是，他不再相信自己的眼睛，确信自己所牵着的那头羊是一条狗了。

Part one _ four analyze four characters respectively. These characters are respectively Emily Grierson, the heroine in Faulkner"s most notable fiction "A Rose for Emily, Jones Wash, an elderly poor white, from Absolom !

论文主体由五部分组成，前四部分分别论述四位边缘人物形象，他们是福克纳最著名的短篇小说《献给爱米莉的一朵玫瑰》的主人公爱米莉·格里尔生，长篇小说《押沙龙！

Note that four data wires and an additional signal ground wire are used in a "four-wire" connection.

请注意4线制连接的4条数据线和另外的一条信号地线是一并使用的。

A Guestimate: It's reasonable that Portland could win three road games, though four is unlikely because one of the sub .500 teams could give them trouble. At home, let's put the Blazers on at least three wins, with four more likely and possibly all five.

推测：虽然四场不太可能，因为有一支胜率在50%以下的球队还是会给他们一点麻烦的，不过合理的话，波特兰应该可以赢下3个客场。

There are four million seven hundred and thirty thousand hectare forests in Yunnan province at present, including one hundred and four million sixty three thousand mu Pinus Yunannensis and Pinus Kesiya, which accounts for 75.7 percent in whole province. There is five hundred million and two million stere storage of wood, accounts for 55.1 percent in total. It is also the first in China. If adequately use this resource, it will tap crude rosin one million two hundred and forty thousand ton, which can produce gum rosin eight hundred and ten thousand ton and gum turpentine oil three hundred and ten thousand ton.

云南省现有松林面积473万公顷，云南松和思茅松森林面积共有一亿零四百六十三万亩，占全省森林面积嘀百分之七十五点七，森林蓄积量共五亿零二百多万立方米，占全省森林总蓄积量嘀百分之五十五点一，居全国各省区之首，如果充沛利用起来，云南省每年可采割松脂一百二十四万吨，生产松香八十一万吨、松节油三十一万吨，相当于日前世界松香总产量一百万吨嘀生产资源。

Italy has a four-roll production equipment and made four three-roll, 32M * 32M space and 12 shot gun room, paint room, such as integrity, and availability of advanced production line of cylinder tower.

拥有意大利产四星辊设备和国产三星辊四台、32M*32M空间及12把枪的喷丸房、油漆房等完整，齐备的先进塔筒生产线。

There are four different ecological strategies among marine fishes, we separately chose large yellow croake, small yellow croake, hairtail and anchovy as the representative fishes of four ocean ecological strategies and analyzed their changes of ecological characters under high intensity fishing environment during the last several decades.

分别选取大黄鱼、小黄鱼、带鱼和鳀鱼作为四种海洋生态对策的代表性鱼类，分析了它们在近几十年高捕捞强度环境下生态学性状的变化。

The half-pound package has four sticks of four tablespoons each, which is half the size of a standard stick.

半镑包有四个坚持四个汤匙每个，这是一半大小的一个标准的棒。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。