To get the incredibly realistic Einstein robot to make facial expressions, researchers used to have to program each of its 31 artificial muscles individually through trial and error.

以前研究人员需要在反复试验和错误中通过对机器人的31块人造肌肉每一块单独编程才能使这个难以置信的真实爱因斯坦机器人做出面部表情。

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The existing program uses trial and error, and pre-programmed mathematical rules that govern folding as understood today.

现有的程序利用试错法，指导折叠的已知数学规则也用到预编程中。

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Fortunately, after five years of trial and error, the development program, which started in 2011, finally achieved success.

幸运的是，经过五年的实验和失败之后，这一始于2011年的开发项目最终取得了成功。

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Some investment advisers say this period of trial and error was inevitable, particularly given how quickly the TARP program came together and the circumstances surrounding it.

FORBES: Intelligent Investing Panel

The TX-NR807 also includes Onkyo's new Bi-Directional Preprogrammed RI Remote Control which will impress anyone who has ever been frustrated by the trial-and-error manual data inputs and paper listings usually needed to program associated TV's, disc players, cable boxes, and other components.

ENGADGET: Onkyo TX-NR807 and TX-SR707 receivers keep the updates rolling