第一次试验后材料表现不错，直至反复试验之后，材料的硬度和轻度都有所下降，但是小组人员说，再试验下去材料的变化也不会太大了。

The first time the stress test was carried out and repeated the material became less stiff and strong, but the team says that further compressions made very little difference.

经过反复试验,我终于找到了正确的方法.

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

但是对于基因工程庄稼已做了大量的反复试验.

But engineering a crop takes a lot of trial and error.

但是对于基因工程庄稼已做了大量的反复试验。

But engineering a crop takes a lot of trial and error .

工程师们在选用其他颜色是采用了反复试验、不断摸索的方法.

Engineers used the trial and error method in selecting the other colors.

他们反复试验，直到招到150名不同的旁观者，每个场景50名。

They repeated trials of this until they had a total of 150 different bystanders, 50 for each scenario.

了解她之后，我开始追求她并且用反复试验的做法试着赢得她的芳心。

After getting to know her, I start wooing her as well as learning to win her heart by trial and error.

经过多次反复试验,成功开发出了新型老化沥青再生剂与老化沥青改性剂.

New recycling agent and modifying addition agent have been exploited successfully by many tests.

中国所有的重大政策变革都是小规模（通常是在单个的地方辖区）反复试验的结果。

All major policy changes in China have been the result of a process of trial and error on a limited scale (usually a single sub-national jurisdiction).

通过借鉴大量的国内外资料和反复试验，我设计的船舶电站模拟器基本实现了上述功能。

Through referring to plenty of domestic and international materials and frequentative experiments, the simulator of ship power station I designed realizes the above functions.