查询词典 PR

Based on GC and GC-MS analyses, the geochemical characteristics of these typical deep viscous oils are listed as follows:(1) strong preference of even n-alkanes over odd n-alkanes;(2) strong preference of phytane over pristane, i. e. Pr/Ph ratio＜＜1;(3) high abundance of gammacerane relative to C〓hopanes;(4) much more amounts of C〓 pentakishomohopanes than C〓 tetrakishomohopanes and even C〓 trishomohopanes.

罗家—垦西地区稠油饱和烃色谱、色谱-质谱分析结果展示：(1)正构烷烃具有明显的偶奇优势；(2)类异戊二烯烷烃具有较强的植烷优势，姥姣烷/植烷比值远小于1；(3)伽玛蜡烷相对含量(相对于C30藿烷)普遍很高；(4)C35升藿烷明显高于C34、甚至C33升藿烷；表现出膏盐湖相生物标志物的组成特征。

The higher amount of gammacerane, relatively low value of Pr/Ph (pristane vs. phytane) and presence of dinosterane all suggest that the lake during the period of Qingshankou 1st formation deposition was subjected to salinity stratification, strong reducing deposition environment, and the potential marine transgression. The shales of Qingshankou 2nd3rd formations mainly contain typeI and typeII kerogens.

青一段泥岩有机质类型主要为Ⅰ型，较高的甾烷含量反映以藻类输入为主，较高的伽马蜡烷和低的Pr/Ph及甲藻甾烷的存在反映该时期水体具有盐度分层和强还原的沉积环境，可能与海侵有关。

In this paper, the probability desity funcfion to pr...

本文中介绍了新近的科研成果，有理论与实验的验证材料和评论。

Finally, the quiescent condition of myometrium is surmounted, the labor then starts. So, alterations in expressions of ER and PR play more important roles in initiation of parturition than estrogen and progesterone themselves.

因此，雌激素受体/孕激素受体的表达变化在分娩发动的环节中可能比雌、孕激素有着更为重要的意义。

The method of analysis of variance was used to analyse germination characteristic of plant cane and ratoon cane in 163 sugarcane varieties of 10 series from PR, CP, H, Q, CO, M,B, Taiwan, Japan, and Philippine.

采用方差分析和相关分析的方法对PR、CP、H、Q、CO、M、B、台湾、日本和菲律宾10个系列163个甘蔗品种的新植和宿根萌芽特性进行分析。

F.M.C. from SAN JUAN, PR port/customs and all suppliers exported from Port RAVENNA - Algeciras , SPECHEM , which includes the contacts of trading parties, detailed cargo information 0 2 8 NW TDI ...

F.M.C。与来自 RAVENNA Algeciras 的出口商 SPECHEM 买卖双方的详细交易数据，包含了进出口双方的联系资料以及货物0 2 8 NW TDI 。。。

Suggest when recompose the code of criminal pr...

建议在修改刑事诉讼法时候，在有关证据的章节中，增加侦查讯问录音录像相关的法律条文，严格规范讯问录音录像的操作规则及程序。

In order to find a kind of PR signal which has good recording performance and is easy to realize under high recording density, the frequency characteristics and the optical recording channel output SNR are compared with the method of simulation and mathematical analysis.

提出了一类适合光记录的部分响应信号，通过仿真和数学分析的方法，分别对这类信号的频率特性和记录信噪比进行了比较，目的在于寻找在高记录密度下既有好的记录特性又便于实现的部分响应通道。

The internet has opened up a new world. Pr ograms can be archived on the computer hard disc and listeners can rehear the m as many times as they want to.

国际互联网为我们开辟了新天地，节目可以作为档案储存在电脑硬盘上，听众可以随心所欲地反复收听这些节目。

A new scheme based on Chinese remainder theorem is pr...

该方案有三个特征：(1)在不改变其它有效群成员的密钥的情况下，可以安全地增加或撤消群成员；(2 )增加或撤消的过程中只需要乘法运算，并且在撤消时群公钥的长度不变；(3)安全性是基于大数分解的困难性

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。