那是一个反复试验的过程。
“这是个需要不断摸索，反复试验的过程”考夫曼博士说，“谷物和几乎所有的蔬菜都是很好的食品。”
"This is a trial-and-error process," Dr. Koufman said. "Grains are good, and almost all the vegetables."
这很可能也是一个迭代过程，同样应该使用反复试验的方法。
It will likely be an iterative process as well, using the trial and error approach again.
为了某些可取的特性，人类选择性地繁育野生植物或动物物种，这一开始是一个断断续续的反复试验过程，驱动它的是由来已久的紧迫之事——饥饿。
Selectively breeding a wild plant or animal species for certain desirable traits began as a fitful process of trial and error motivated by that age-old imperative: hunger.
有时，这样的学习过程是要通过反复试验的。
整个过程就是反复试验：尝试很多不同的东西，看哪个好用。
The whole process is trial and error: Try a lot of different things, and see what works.
整个过程就是反复试验：尝试很多不同的东西，看哪个好用。
The whole process is trial and error: Try a lot of different things, and see what works.
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