反复试验

This produces the strain to have the biology active function natural plant, after the repeated test, the science blends, careful screening soaks raises the biological activity material which or the extract craft processing becomes, uses in the birds and beasts class animal specially, may substitute the antibiotic class feed additive, enhances the birds and beasts body immunity, the promotion meat birds and beasts grows, enhances the egg birds and beasts to produce the egg rate and so on.

2006年7月22日本产品系具有生物学活性功能的天然植物，经反复试验、科学配伍、精心筛选后以浸提或萃取工艺加工而成的生物活性物质，专用于禽类动物，可以替代抗生素类饲料添加剂，提高禽体免疫力，促进肉禽生长，提高蛋禽产蛋率等。

At the best of times, this is a trial-and-error process conducted by individuals full of good will.

在最有利的情况下，这是那些有着美好愿望的人们反复试验的过程。

You can learn how to use it properly by trial and error.

你可以通过反复试验来学习如何正确使用它。

You got to do it by trial and error.

你只能反复试验。

I finally found the right key by lots of trial and error.

经过反复试验，我终于找到了正确的方法。

You learned to walk by repetition and trial and error of some simple procedures.

学习走路的过程就是一些简单程序的重复和反复试验。

They also need to practise skills and learn by trial and error.

他们也需要锻炼技巧和通过反复试验来学习。

In making new discoveries, they may use the trial-and-error method, they may draw on past experiences, or they may try to find out what others have discovered.

在探索新的发现的时候，他们可以采用反复试验的方法，可以从过去的试验中吸取经验，他们也可以弄清楚别人的发现。

In making new discoveries, they may use the trial-and-error method, they may draw on past experiences, or they may try to find out what others have discovered.

在探索新的发现的时候，他们可以采取反复试验的方法，可以从过去的试验中吸取经验，他们也可以弄清楚别人的发现。

Dongguan Jian Qiao Equipment Co., Ltd was established for many years, located in Guangdong Province Tangxia Tangxia Town, Dongguan City Industrial Zone on the 30th the first company has been engaged in the electronic testing equipment, environmental test equipment sales services and the development of automatic test system, the main product has : testing machine, furniture testing machine, swing machine, optical quality control testing instruments, wire tester, wear-resistant machine, constant temperature and humidity machine, optical image measuring instrument, wire testing machine, office chair repeated impact test machine, a desk drawer repeated testing machine, office chair backrest repeated testing machine, office chairs rotary life testing machine, officelife test machine, plug line hoist swing test, MIT-style folding strength testing machine, tensile testing machine, micro-computers, paper tube compression testing machine, aging test machine, testing machine decolorization extent, resistant to rubbing tester, testing machine embrittlement, sudden pull test machine, testing machine, such as bonding strength.

东莞市剑乔仪器设备有限公司创建多年，位于广东省东莞市塘厦镇塘厦第一工业区30号公司一直从事电子测试仪器、环境试验设备的销售服务和自动测试系统的开发，主要产品有：试验机，家具试验机，摇摆试验机，光学品管检测仪器，线材测试仪，耐磨机，恒温恒湿机，光学影像测量仪，线材试验机，办公椅反复冲击试验机，办公桌抽屉反复试验机，办公椅反复靠背试验机，，办公椅旋转寿命试验机，办公椅脚寿命试验机，插头线吊重摆动试验，MIT式耐折强度试验机，微电脑拉力试验机，纸管抗压试验机，老化试验机，脱色程度试验机，耐揉试验机，脆化试验机，突拉试验机，胶合强度试验机等。

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。