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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。

Optimal extraction pressure, extraction temperature, CO2 flow rate, extraction time and dosage of entrainer per gram of tobacco powder were 24 MPa, 55℃, 3.8 Lh^(-1), 3 h, 6 mL, respectively.

优化后的萃取工艺条件为：萃取压力24 MPa、萃取温度55℃、CO2流速3.8 Lh^(-1)、萃取时间3 h、每克烟末夹带剂用量为6 mL。

This distinctive action is not only to the shallow epiphyte but also to the deep epiphyte. The inhibited fungi efficiency of 0.1% acid reaches 90% and the 0.5% clotrimazole is 68%. And they also have inhibition action to grain-negative and gram-positive bacteria.

体积分数为0.1%的白果酸抑制真菌的有效率达90%，而体积分数为0.5%的克霉唑抑制真菌的有效率仅为68%，同时该提取物对各种革兰氏阴性和阳性细菌也均有抑制作用。

Erysipelothrix rhusiopathiae is a gram-positive bacterium that causes erysipelas in animal and erysipeloid in humans.

猪丹毒杆菌是一种革兰氏阳性菌，会造成动物的丹毒症与人的类丹毒。

These two isolates presented typical characteristics of Streptococcus iniae with gram-positive cocci in chains, catalase negative and beta-hemolytic, growth under 10℃ and non-growth up 45 ℃, hydrolyzation of esculin and arginine, Voges-Proskauer, urease, and hippurate tests negative, fermentation of glucose, salicin, sucrose and starch, non-fermentation of arabinose, inulin, lactose, melibiose, raffinose and sorbitol.

实验结果表明，两菌株具有典型的海豚链球菌特性：在显微镜下为球形细胞，呈长短不一的链状排列，革兰氏染色阳性：在血琼脂平板上显示β溶血；1O℃生长，45℃不生长；接触酶阴性；水解七叶苷、精氨酸，VP试验、脲酶和马脲酸试验阴性；发酵葡萄糖、水杨苷、蔗糖和淀粉，不发酵阿拉伯糖、菊糖、乳糖、蜜二糖、棉子糖和山梨醇等。

Nov.. The main symptoms of the bacterial disease on Vigna angularis were canker of stalk.The strains were straight or curved rods; polar flagellum one; Gram-negative; could infect Vigna angularis、 Glycine max、 Vigna radata、 Vigna umbellate、 Phaseolus vulgaris、 Pisum sativum、 Pisum sativum var.humlie; oxidase negative; nitrate reduction negative; 5% glucose agar mucilage positive; esculin hydrolysis positive; starch negative; milk hydrolysis positive; H_2S positive; acid from L-arabinose, D-mannose, D-galactose, cellobiose, trehalose and fructose; 5%NaCl positive; G+Cmol%-69%.

红小豆溃疡病主要症状为茎部溃疡；各菌株菌体均杆状；极生鞭毛1根；革兰氏染色阴性；人工接种能侵染多种豆科植物；好氧；氧化酶阴性；硝酸盐反应阴性；5％葡萄糖营养琼脂黏液生长阳性；七叶灵水解阳性；淀粉水解阴性；牛奶分解产碱；产生硫化氢；能从阿拉伯糖等产酸；最大耐盐量为5％；G+Cmol％为69％等特征，根据《手册》9th ed相关部分，确定该病由野油菜黄单胞菌苜蓿致病变种Xanthomonas campestris pv.alfalfae(Riker，Jones et Davis 1935)Dye 19781引起。

Methods 135 patients were randomly divided into 2 groups:in treatment group women took one intravaginal estriol suppository (contained 2mg estriol) and in control group women took 0 5 gram intravaginal premarin cream (contains 0 3125mg premarin) per day.1 week later,drugs were taken weekly and this last 8 weeks.

方法对 135例老年性阴道炎妇女随机分成两组：90例治疗组每日将含 2mg的雌三醇栓 1枚放入阴道深部，1周后每周放入 1枚，连用 8周；45例对照组用药为含 0 312 5mg倍美力的倍美力软膏，用法同治疗组。

The experimental results show that when the ratio of seven water ferrous sulfate amount: Calcium carbonate powder amount: Ferri waste residue amount =1.6∶1∶1, desulphurization effect of the obtained product is the best. Each gram of this kind of desulfurizer can completely absorb the sulfur element, which is included by 0.064 9 g five water sodium sulfide.

实验结果表明：当七水硫酸亚铁∶碳酸钙粉末∶含铁废渣=1.6∶1∶1时，制备的脱硫剂脱硫效果最好；每克脱硫剂可全部吸收0.0649g五水硫化钠中的硫元素。

It is mainly dealed with the accuracy of finite item expansion of Gram-Charlier series.

如各种偏心类误差，服从瑞利分布，是一种偏倚较大的非对称分布。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"