四组

The PV system only consists of a single phase full-bridge pulse width modulation inverter with an auxiliary LC series resonance circuit. DC power generated by the solar cells can be converted into AC power and fed to the utility line.

本系统利用四组全桥式直到交流转换器，配合一组LC串连滤波电路，即可将太阳电池所产生之直流电能转换成交流电送入电力系统中。

The spelling bee was divided into three groups, with each group consisting of three grades.

决赛依年级共分成四组，每三个年级为一组，分组选出冠军一名。

In the string music team, every instrument is played by many persons.

弦乐组每种乐器有多人演奏，四组演奏者由一人统筹兼领导，他就是乐团的指挥。

Intervention Participants were randomly assigned to 1 of 4 groups: 102 to the nonexercise control group and 155 to the 4-kcal/kg, 104 to the 8-kcal/kg, and 103 to the 12-kcal/kg per week energy-expenditure groups for the 6-month intervention period.

处理：参与者随机分成四组：对照组为不运动组，102人；每周能量消耗4-kcal/kg的155人；每周能量消耗8-kcal/kg的104人和每周能量消耗12-kcal/kg的103人，分别进行为期6个月的干预期。

Interention Participants were randomly assigned to 1 of 4 groups: 102 to the nonexercise control group and 155 to the 4-kcal/kg, 104 to the 8-kcal/kg, and 103 to the 12-kcal/kg per week energy-expenditure groups for the 6-month interention period.

处理：参与者随机分成四组：对照组为不运动组，102人；每周能量消耗4-kcal/kg的155人；每周能量消耗8-kcal/kg的104人和每周能量消耗12-kcal/kg的103人，分别进行为期6个月的干预期。

The exception to this would be if the vocal folds are not stretched, as stretching of the vocal ligaments abducts the vocal processes

很多人都认为&海豚公主&张靓颖有海豚音，实际上并不是这样，她仅可以唱到小字三组（据说F6，即f3，与mariah等人的小字四组（c4）确实还有一定差距。

METHODS 10 mm long segmental defects were created in the diaphyses of both radii in 16 New Zealand rabbits. The defect was bridged with a silicon tube. Human recombinant aFGF was instilled into the tube on the experimental side, while the contralateral tube was instilled with saline as control group.

16只新西兰白兔分为四组，每组 4只，造成兔双侧桡骨干10mm节段性骨缺损，以硅胶管桥接骨缺损，实验侧管内置入人基因重组酸性成纤维细胞生长因子24μg，对侧管内注入生理盐水作对照。

This prospective, nonrandomized, open study took place at a private dermatology practice. A sequence of four groups, each made up of 10 to 20 office patients with DSO, were treated with pulse-dosed oral terbinafine, 250 mg per day for seven consecutive days, at intervals of two, three, and four months. Treatment was stopped when the distally advancing new nail bed and nail had completely removed the mycotic defect, or when fungistasis had failed.

这项研究是在一家私人皮肤科诊所进行的，为一预期性、随机性的设计；试验组包含一系列的四组，每组都有10至20个DSO患者，每位患者都接受脉冲式口服terbinafine治疗：每天250毫克，连续7天为一个治疗期；治疗间隔为2个月、3个月及4个月，治疗直到受霉菌感染的甲床及指甲，以自然生长的方式，完全被更换，或是这项抑霉治疗法无效为止。

Adult rats were measured body weight and imaged by Micro-CT, then divide into four groups randomly; according to control, low dosage, medium doagse, high dosage. Each group was given aqueous solution of Paraquat via oral single dosage at 0mg/kg, 40mg/kg, 60mg /kg, 80mg/kg, respectively.In control group, the color and luster of the lung samples appeared normal and no petechia was observed.

成鼠先秤重及Micro-CT造影，再以随机方式分成控制、低剂量、中剂量、高剂量四组，依其组别给予单次不同剂量之巴拉刈水溶液，给药后每周进行两次秤重及Micro-CT造影，连续进行四周，并在每周造影后，每组随机牺牲一只成鼠，取出肺脏，进行检体及组织病理观察。

Using Field single ignition experiments of the four unconfined volume dispersion and small dosage solid FAE and TNT bombs experiments, we got the peak overpressures of solid FAE at different distances. Compared with TNT, The overpressure of FAE is 1.14~1.6 times higher than that of the TNT. Based on the theory of the air shock wave overpressure, the FAE relativity TNT mass is evaluated. At the edge of the explosive field, the number is 3.88. Pictures of high speed photography indicate that the duration and the most effect area of the FAE and TNT. Compared with TNT, obviously the FAE has more advantages. And, based on the theory of the critical concentration of dust explosion, the radius of dust explosive zone is evaluated. The phenomenon that the overpressure decays rapidly with distance is analyzed. It is suggested that the explosive temperature should be increased as the main approach to improve the FAE explosive capability in the condition when the over pressure is invariable.

通过四组无约束固态燃料空气炸药装置与等质量的TNT在野外开放空间的一次起爆对比实验，测得了不同配方组份FAE装置在不同距离的爆炸超压分布，FAE装置峰值超压比相同距离的TNT高1.14-1.6倍；并运用空气冲击波峰值超压公式计算出了FAE的等效爆炸TNT当量随距离的变化关系，在爆炸场边缘区，FAE装置爆炸当量达到了3.88倍TNT当量；通过高速摄影的图片得到了爆炸产生火球的持续时间和最大作用范围，与等质量TNT爆炸火球相比，FAE的优势明显；运用粉尘爆炸下极限浓度估算了云雾爆轰区半径，并分析了测量到的固态FAE爆炸场的压力分布单调衰减的原因；建议在保持超压不变的情况下，把提高爆温作为提高FAE爆炸性能的主要途径。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。