查询词典 P.O.D.

A new compound has been isolated from the Laurencia majuscule Lucas, it"s structure was determined by IR, MS,"HNMR, 13CNMR, clemently analysis.The compound is P -d-Arabinoside, 1-O-hexadecyl.

从采自西沙群岛的略大凹顶藻乙醇提取液的乙酸乙酯部分分离出了一个化合物，经IR、MS、~1HNMR、~(13)CNMR、元素分析等方法鉴定为一个新化合物：β-十六烷基-D-阿拉伯糖甙。

This result is a higher-dimentional analogue of the Fundamental Theorem of Calculus: it expresses the integral over D of some kind of derivative of P and Q in terms of an integral of P and Q over the boundary of.

格林公式建立了曲线积分和二重积分的关系 O 这是微积分基本定理在高维情形的推广：它将上P、Q某种形式的导数的积分用的边界上 P、 Q 的积分表示出来。

The crystal structure of pure Pd is of face centered cubic and it is a hydrogen absorbing metal.

钯是一种面心立方结构的吸氢金属，氢原子溶解在晶格中，占据八面体间隙位，形成fcc的子晶格，吸氢时晶格发生等方性膨胀；氢在钯中的扩散路径为O T O跃迁，存在反同位素效应；钯氢化物的氢同位素分离因子较大，并受到温度、氢浓度等因数的影响；钯氢体系的p c等温线表现出良好的坪台性，Pd H和Pd D均存在临界点，尚未确定Pd T有无临界点；单晶钯氢反应动力学与不同的晶面有关；钯氚体系存在氚老化效应

R O! m/; p- G% H The double world champion crossed swords with Hamilton in the Briton's debut season in the top flight, initially being surprised by the rookie's turn of speed, then his consistency, as Hamilton mounted a championship challenge that Alonso felt should have been his alone.

|。 T4 z2 Q U： t/ h7 R； E5 D 两届世界冠军在英国人的头一个赛季与汉密尔顿交锋谁高谁低，起初对于新手的速度有些惊讶，然后他经常是那么快，后来汉密尔顿瞄准了世界冠军，阿隆索感到了他的孤独。

In addition ,nine new O,O-dialkyl-[α-(1,3,4,6-tetraacetyl-2-deoxy-β-D-glucoamino)-p-methyl benzlidene] phosphonatesand eight O,O-dialkyl-α-(2-deoxy-D-glucoamino)-p-methyl benzylidene phosphonates were prepared. The 〓 and〓 spectra of Ⅰ-Ⅴ compounds indicated clearly that each of Ⅰ-Ⅴ compounds contains two diastereo-isomers.

我们对非对映异构体的分离方法进行了研究，并分离得到了五个单一构型的异构体〓、〓、〓、〓和〓，培养出了〓、〓和〓三个异构体的单晶，通过X-射线衍射分析，确定了〓、〓和〓三个异构体的绝对构型，反应过程中引入的手性原子的构型均为R构型。

This Next ad is from the Horological Journal from September of 1953 and sheds substantial light on Rolex Everest Expedition History.4 ^; E% u: k2 E3 l m, p

这一广告是由钟表杂志从1953年9月和鸡舍重大轻劳力士珠穆朗玛峰的探险史。， D H( m \1 p6 O-|* o

This paper discusses a discrete stochastic Lotka-Volterra competition systemwhere ε_1,κ are i.i.d N(O,1),ε_2,κ are i.i.d N(0,1), p is is revelant coefficient of ε_1,κ and ε_2,κ. Maximum Likelihood Estimation of parameters and asymptotic characteristic of the system are studied.

本论文主要讨论离散随机Lotka-Volterra竞争系统其中ε_1，κ是i.i.d N(0，1，ε_2，κ也是i.i.d N(0，1)，ρ是ε_1，κ与ε_2，κ的相关系数参数的极大似然估计及估计模拟和系统的渐近性。

P3 z9 |% I/ _5 A: o Children who play truant from school are unimaginative.

& p i$ \2 d& h2 ~逃学的孩子们都缺乏想像力。

In the model of DNFB-induced mouse ear edema, the inhibitory rate of edema of compound A at dose of 50mg/kg/d p. o. was 41%, the inhibitory rate of myeloperoxidase activity was 81% of compound A at the same dose.

化合物A灌胃给药50mg／kg／天可抑制DNFB诱导的小鼠迟发型变态反应，耳肿胀抑制率为41%，耳髓过氧化物酶抑制率为81％。

Their IR, Raman, XPS, TG-DTA and fast-atom-bombardment mass spectra are quite different and indicate that they have different d.p.

这种差异主要因制备方法不同，获得样品中羧基间氢键作用以及Ge-O环尺度和键角不同引起的。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。