四重的

Carl Sagan has entertainingly described this phenomenon, musing about the destiny of bacteria that reproduce by dividing into two every 15 minutes. Says Sagan:"That means four doublings an hour, and 96 doublings a day. Although a bacterium weighs only about a trillionth of a gram, its descendants, after a day of wild asexual abandon, will collectively weigh as much as a mountain...in two days, more than thesun - and before very long, everything in the universe will be made of bacteria." Not to worry, says Sagan: Some obstacle always impedes this kind of exponential growth. The bugs run out of food, or they poison each other, or they are shy about reproducing in public.

Carl Sagan 曾经开玩笑地解释这种现象，假设有一种细菌每15分钟可以分裂一次，亦即代表每一小时复制四次，一天可复制96次，虽然单一个细菌其重量只有一兆分之一公克重，但是只要经过一天无止尽的无性生殖，其重量可能会比一座山还重，经过两天后，甚至会比太阳还重，要不了多久所有的宇宙都将由这种细菌所组成，不过 Sagan 又说，大家不必担心，上天一定会安排障碍来阻止其倍数成长，有可能他会耗尽食物，或是毒死自己，或是有可能羞于在大庭广众之下复制。

Carl Sagan has entertainingly described this phenomenon, musing about the destiny of bacteria that reproduce by dividing into two every 15 minutes. Says Sagan:"That means four doublings an hour, and 96 doublings a day. Although a bacterium weighs only about a trillionth of a gram, its descendants, after a day of wild asexual abandon, will collectively weigh as much as a mountain...in two days, more than the sun - and before very long, everything in the universe will be made of bacteria." Not to worry, says Sagan: Some obstacle always impedes this kind of exponential growth.

Carl Sagan 曾经开玩笑地解释这种现象，假设有一种细菌每 15 分钟可以分裂一次，亦即代表每一小时复制四次，一天可复制 96 次，虽然单一个细菌其重量只有一兆分之一公克重，但是只要经过一天无止尽的无性生殖，其重量可能会比一座山还重，经过两天后，甚至会比太阳还重，要不了多久所有的宇宙都将由这种细菌所组成，不过 Sagan 又说，大家不必担心，上天一定会安排障碍来阻止其倍数成长，有可能他会耗尽食物，或是毒死自己，或是有可能羞于在大庭广众之下复制。

While it is randomly grabbing around with rage, the dragon god flits to the proximity of its feet and inserts four inverse claws into the skin of it (there are three straight claws and one inverse claw to form a whole dragon claw).

天魔出招越来越是混乱急躁，雷鞭如雨般向龙神击去，但龙神在其中滑溜地穿梭，很快又一爪抓瞎了它好几只眼，然后一尾打在它另外几只眼上，趁它愤怒乱抓之时，飞到了它足部附近，将四支倒爪刺入天魔外皮(每只龙爪有三支正爪一支倒爪)，然后一边绕著它飞，一边往上升，於是天魔身上就被抓出四道螺旋状的深深爪痕，等飞到天魔头部，龙神放开四爪，随著一声长啸往九天之上翔去，瞬时天魔头顶就出现一个直通九天的大洞，从洞中吹下的虚空旋风将天魔皮肉从爪痕处撕裂，重归暗云，从天空落下

The leaf mass per unit area decrease gradually with the light regimes bringing down. The leaf of Fatsia japonica changes obviously, the other three species change obviously neither under 24%daylight or 6%daylight, but under 58%daylight dose.

四种植物的比叶重均随光照强度的减弱而减小，八角金盘的比叶重变化显著，其它三种植物的比叶重在24％自然光强下和6％自然光强下变化均不显著，但同58％自然光强下的比叶重相比，变化较显著。

Weigh on the 1 st day of the 8th week, postanesthetic, the broken marrow is put to death , take out the heart , liver , brain , kidney and musculus quadriceps femoris and put and clean the blood in icing the physiological saline immediately , blot with the filter paper, weigh.

第8周的第1天称重，麻醉后，断髓处死，立即取出心、肝、脑、肾和股四头肌置于冰生理盐水中洗净血液，用滤纸吸干，称重。

The first part is literature review of relevant Customer Value Theory. In the following part, research questionnaires about customer value in health and fitness entertaining and straight rebuy tendency are designed concerning to existing survey methods and combined with the status quo and features of health and fitness entertaining enterprises. The third part is surveys and analysis about the status quo of custom value in bodybuilding clubs in Nanjing. Six common factors, named as "sentimental value","consumption cost","product value","service value","expected value", and "function value", are concluded as the elements of customer value in health and fitness entertaining after factor analysis and are discussed in the fourth part. In the fifth part, influences of the various elements of customer value on customers' straight rebuy are obtained by Logistic regression analysis. The sixth part is about the relationship between customer individual attribute and customer straight rebuy reached through partial correlation analysis.

首先，梳理了顾客价值理论和体育健身俱乐部相关研究的文献；其次，以顾客价值已有的探测方法，结合商业性健身俱乐部的现状及特点，设计出商业性健身俱乐部顾客感知价值及重购意向的调查问卷；第三，对南京市健身俱乐部顾客价值现状进行了调查和分析；第四，通过因子分析得出商业性健身俱乐部顾客价值构成要素结构，共有六个公共因子，命名为&情感价值&、&消费成本&、&产品价值&、&服务价值&、&期望价值&、&功能价值&；第五，通过Logistic回归分析，得出健身俱乐部顾客价值构成要素对顾客重购行为的影响；第六，通过偏相关分析得出健身俱乐部顾客个体属性与顾客重购行为的关系。

The experimental diet with glutamine (10 g/kg), or with lactitol (3 g/kg), or with tributyrin (5 g/kg), or with lactitol (3 g/kg) plus tributyrin (5 g/kg), the aim is to determined effects of several several substances and compound on early weaned piglets.

整个试验分为以下四个部分： 1 几种物质对早期断奶仔猪生长性能的影响在断奶当天、断奶后7天、14天、21天及28天分别对仔猪进行称重，观测猪只的平均日增重、日采食量、料重比及腹泻率。

This old man, he played three, He played knick-knack on my tree; With a knick-knack paddywhack, Give a dog a bone, This old man came rolling home.

与小玩意儿，稻重击，给狗一根骨头；这个老人回家了辗压。这个老人，他演奏了四；他在我的门演奏了小玩意儿与小玩意儿，稻重击，给狗一根骨头；这个老人回家了辗压。

Centrifuging method was used to determine soil water characteristic curves of four undisturbed soils different in bulk density, and through the experiment, surfaces depicting quantitative relationship between mass water content, pressure head and bulk density in the four soil samples were obtained.

用离心机法测定了四种原状土壤不同容重下的土壤水分特征曲线实测点，从实验上获得了四种原状土壤的质量含水量、吸力和容重三者间定量关系曲面。

Firstly it takes for example the lack and loss of taking student as the main of education in such respects as seeking short-term success and quick profits and attending to trifles and neglecting essentials in siting Chinese teaching goal; paying too much attention to the basic knowlegde and skill and ignoring the humane intension; stressing teacher" s instruction to student"s participation; the long unimplemented position of student as main body in teaching relation.

本文对此从以下四个方面进行了论述：首先从当前中学语文教育的现状出发，列举了主体性教育缺失的四种现象，主要有在语文教育目标的定位上急功近利，舍本求末；在语文教学内容上重&双基&教学，忽视人文性内涵；在语文教学的方法上重教师讲授轻学生的主动参与；在师生关系上学生主体地位没有真正得到落实。

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。