21的例句大全

Protected Agriculture ─ the Development Way of Button Mushroom Cultivation in Yunnan Province in 21 Century

设施农业&云南省21世纪双孢蘑菇栽培业的发展方向

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13.71% ethylene, 21.45% propylene and 11.34% butylenes were obtained under a reaction temperature of 610 ℃;

在兼顾乙烯和丙烯生产的操作条件下，乙烯、丙烯和丁烯产率分别达到13.71%、21.45%和11.34%；

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Clinical analysis of surgical treatment to 21 cases of acetabulum fracture

髋臼骨折手术治疗21例临床分析

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Objective: To investigate the expression level of genes located in chromosome 21 in the brain tissues of Down syndrome ( DS).

目的分析唐氏综合征（Down syndrome，DS）胎儿脑组织21号染色体（Chr21）基因的表达，探讨DS脑病变的分子机制。

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34 cases in TG were given full parenteral alimentotherapy supplemented with mixed milk during the peri-operating period, while 21 cases in CG were only given mixed milk, all being given by nasal feeding 5-6 thimes a day.

观察组34例给予围手术期全胃肠外营养配合混合奶，对照组21例给予混合奶，每日鼻饲5-6次。

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In vivo, faint responsiveness of anergic T cells induced by SEA injections at 3 days interval and at 28 days interval could be seen respectively after 21 days and 28 days.

在体内，间隔3天组和间隔28天组中诱导的无能T细胞分别从末次注射后第21天和第28天开始出现较弱的应答反应。

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21 cases angulated upward, 7 cases angulated downward.

向上成角型21例，向下成角型7例。

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Field investigation shows no permafrost in the interior of the Zoige Plateau. The mean annual air temperature is 0.6~ 3.3 ℃, and the annual range of air temperature is 19.1~ 21 2 ℃.

若尔盖高原内部年平均气温0.6～3.3℃，气温年较差19.1～21.2℃，已不具备多年冻土形成和保存的气候条件。

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Since 1976 strong changes in seasonal cycle have taken place, with winters becoming warmer and summers colder. The annual range of monthly mean temperature in the latest 21 years was 1.7 ℃ less than in the earlier 43 years.

1976年起季节循环有明显变化，冬季变暖夏季变凉，月平均气温的年较差比前43年减小1.7℃。

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It is approximately the LCM (lowest common multiple) of the synodic period (29.53 days), draconic period (27.21 days), and the anomalistic period (27.55 days) of the Moon.

沙罗周期日数约为朔望月周期（29.53 日）、 交点月周期（27.21 日） 和近点月周期（27.55 日） 的最小公倍数。

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Among 6373 coal workers, the prevalences of anthracosis, chronic bronchitis and emphysema amounted to 0.26-15.2%, 21.9-36.9% and 11.8% respectively.

检查了6373名煤尘作业工人，煤肺患病率为0.26～15.2%，慢性支气管炎患病率为21.9～36.9%，肺气肿为11.8%。

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The clocks in Apia, the capital, are 21 hours behind Canberra but only four hours behind San Francisco.

萨摩亚首都阿皮亚比目前比堪培拉晚21个小时，但只比旧金山晚4个小时。

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Arthropod community including 21 different species on eggplant in plastic shed was divided into phytophagous, predacious, parasitic, hyper-parasitic and arachnid sub-communities.

茄子塑料大棚内节肢动物群落由21种物种组成，可分为植食性、捕食性、寄生性、重寄生性和蜘蛛等五个亚群落。

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The Development of Armed Force in the 21's Century

二十一世纪的军队发展

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Students below the age of 21 years must get their parents or guardians written consent.

不满21岁的学生需要父母或监护人的书面同意.

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A : China's urban development has entered a crucial moment after we stepped into the 21 st century.

李铁: 进入21世纪,中国城镇化的发展到了关键时期.

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Let's work together meet the challenge of 21 st century.

让我们一起工作,迎接21世纪的挑战.

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Results: The objective response rate of neoadjuvant chemotherapy assessable in 21 patients was 43%.

结果21例患者中新辅助性化疗的客观应答率达43%。

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Development of New Variety of Avena Nuda Huazhong 21 by Adopting Anther Haploid Breeding Method

采用花药单倍体育种方法育成花中21号莜麦新品种

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Methods 40 patients, 19 males and 21 females, with cleft lip and alveolar process only were included. The age range of the patients was from 8 to 33 years with the mean age of 13.8 years when the alveolar bone grafting was performed.

方法40例单侧唇裂合并单纯牙槽突裂患者（19男，21女），手术进行时患者的平均年龄为13.8岁，年龄范围8至33岁。

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