学习编程通常涉及大量的反复试验。

Learning to code often involves a lot of ___trial ___and ___error.

没有指导，你可能不得不依靠反复试验来解决问题。

Without guidance, you may have to rely on ___trial ___and ___error to solve the problem.

科学家使用反复试验来发展新理论。

Scientists use ___trial ___and ___error to develop new theories.