1. Many people object to experimentation on animals. 
   许多人反对用动物做实验.
2. The process of conducting such a test; experimentation. 
   实验过程做这种试验的过程；实验
3. After years of experimentation they finally hit pay dirt. 
   他们经过数年的试验，终于成功了。
4. To discover with certainty, as through examination or experimentation. 
   查明，弄清由事实查明，如通过检查或试验
5. a new device or process created by study and experimentation. 
   通过研究和实验创造出的新的装置或方法。

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