21的例句大全

Based on the investigation record from Guangxi and Hainan Provinces, this species bores in the substrate of sand or sand-mud from surface to 21 cm underneath below the low tide zone to a water depth of 78 m.

据在广西和海南沿海的调查，它生活在潮下带至水深78m的沙或沙泥底质中。营埋栖生活，深度达21cm。

On the basis of the international benchmark problem 21 on simulating 3D stray loss, the model on 3D eddy current loss is further presented and set in order to simulate core tie-plate made of non-magnetic steel in large transformers.

在模拟三维杂散损耗的第21国际基准问题的基础上，提出并建立了以模拟大型变压器铁心低磁钢拉板为背景的三维涡流损耗模型。

It's called the Phoenix and, as you can see, it's a tight fit. Just 21 inches in diameter.

这个救生舱叫做“凤凰号”，你可以看到，空间非常狭小，直径只有21英寸。

After 21 d and 3 mo treatment, ADL of 2 groups with most serious nervous activity disturbance showed significance difference(( P < 0.05)).

治疗21d和3mo后，治疗组中重度病人的ADL差值差异均有显著意义（P

To treat 865 patients suffered from tinea corporis tinea cruris with miconazole nitrate cream for 21 days, 736 cases ( 85.1%) of all patients are cured, 126 cases ( 14.6%) effective, 3 cases ( 0.3%) of no effect.

865例体癣和股癣患者用硝酸咪康唑霜治疗21天，痊愈736例（85.1%），有效126例（14.6%），无效3例（0.3%），总有效率99.7%。

Variational perturbation calculation for hydrogen-like atoms in the small and time harmonic electric field ⅱ: the excited states ( 21 ± 1) and ( 32 ± 2)

弱时间简谐电场中类氢原子的变分微扰计算Ⅱ：激发态（21±1）和（32±2）

21 Century is a time of technology developing quickly, and a time of society of information and knowledge economy.

21世纪是科技更加迅速发展，全面进入信息社会与知识经济的时代。

Conclusion: CD71 and HbF double-staining method can improve NRBCs specific labeled and sorting purity and make advantage for the next prenatal diagnosis. The best time of sorting fetal NRBCs in maternal blood is at the 21~ 24 week.

结论：采用CD71和HbF双染色标记，可提高NRBC的特异性标记和分选纯度，分选胎儿细胞的最佳时间应在孕21~24周。

21 century is the global economy integration and the time step into cultural management.

21世纪是全球经济一体化的时代，也是企业迈进文化管理阶段的时代。

One of the kindest things anyone ever did for me was an elderly, very distinguished don who introduced me to the world's most encouraging literary agent when I was 21.

曾经有人为我做过的最好的事值之一是，一位年长的、非常有名的大学教师把我介绍给了世界上最振奋人心的一位文学代理人，当时我才21岁。

Methods All the 160 patients with superficial mycoses ( 18 with tinea manum, 74 with tinea pedis, 47 with tinea cruris, 21 with tinea corporis) were divided into Group A and Group B at random.

方法将160例浅部真菌病患者（手癣18例，足癣74例，股癣47例，体癣21例）随机分为A，B两组。

For the tissue valve prosthesis in the donor area, 21 pieces of arteries in the depth, 32 pieces of the artery in the shallow were found.

供区组织瓣内检出深部动脉21条，肌皮穿支动脉32条。

SD male rats aged 21 days were continuously exposed to light for 30 days in order to inhibit secretion of melatonin ( MT). Changes in serum MT, testosterone, corticosterone, thyroid hormones ( T_ 3, T_ 4), adrenalin and noradrenalin were determined.

对21日龄SD雄性大鼠持续光照30d以抑制褪黑素（MT）分泌，观察血液中MT、睾酮、皮质酮、甲状腺激素（T3、T4）、肾上腺素和去甲肾上腺素的变化。

A 1,500-member military brass band, a 2,100-member adult choir, a 300-member children's choir and a 130-member folk percussion group sang and played 21 songs to accompany the parade. It was the largest number of people to make music for a National Day parade.

在阅兵过程中，1500人的军乐队、2100人的成人合唱团、300人的儿童合唱团、以及130人的民间打击乐队演唱和弹奏了21支乐曲。这是最大规模的国庆阅兵伴奏团队。

METHODS: The experiment was conducted at the Microsurgery Institute, Medical College, Wuhan University from December 2002 to March 2004. Totally 21 male flap-eared Japanese rabbits were selected as donor and 42 female ones as recipients.

方法：实验于2002-12/2004-03在武汉大学医学院显微外科研究所完成。日本大耳兔雄性21只为供体，雌性42只为受体。

It takes 19& 21 days to finish the course from the differentiation of archesporial cell, the development and maturity of female gametophyte to anthesis.

从孢原细胞分化，雌配子体发育成熟至开花，约需19～21天。

Please hand in a hardcopy of this form to the Teaching& Learning Office before Jul 21.

请在2006年7月21日前将此表交到国际学院教学办公室。

The valve work condition and normal failure are studied in this paper. The heat treatment of 21-4N steel exhaust valve is related to the samdwich separated out. The samdwich affects the valve capability 21-4N steel exhaust valve fatigue fracture is caused by thermal overstress.

本文介绍了气门的工作条件、正常失效及21-4N钢排气门强化热处理与层状析出的关系，分析了层状组织对其性能影响和21-4N钢排气门过载断头失效的原因。

STR-PCR technique was used to amplify 4 loci on chromosome 21, 3 loci on chromosome 18 and 3 loci on chromosome 13 to diagnose those chromosomal trisomies as well as the parental origins of the extra chromosomes and the stages of nondisjunction.

采用STR-PCR技术，扩增21号染色体4个位点；18、13号染色体各3个位点，诊断这些染色体三体综合征，与染色体核型对照：并判断额外染色体双亲来源和染色体不分离发生时期。

China strives to build 21~ ( st) century quality ships

中国倾力打造21世纪质量船舶