The actual tests would employ the well-honed methods of operant conditioning, developed initially on pigeons, in which the test subject has first to work out what is going on by trial and error.

实际的测试会采用精确的操作性条件反射方法，测试对象首先要清楚实验的过程和错误。

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Function test and adjust error for log on sea trial.

航行试验中计程仪效用试验及误差调整。

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In fact, the genome resembles nothing so much as a hodgepodge of borrowed, copied, mutated, and discarded sequences and commands that has been cobbled together by millions of years of trial and error against the relentless test of survival.

FORBES: The Myth ... of the Myth of Junk DNA