This is not limited to critical systems. Any non-trivial engineering project where bugs are expensive (which is most of them) accelerates when correctness is cheap.
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行车中写作业，对颈椎、视力都不好，急刹的时候，人磕着了是真疼；如果真有特殊情况要写，请把车停稳、车打开，座椅调到最佳位置，偶尔救急可以，但不要成为日常。