诚然，标志着职能作用不可低估。
礼貌语言不费劲，良好作用不可低估。
Mouth civility is no great pains, but may turn to good account.
道德习惯有广义和狭义之分，它在个体道德生活中的作用不可低估。
Moral habits, the concept of which is used both in the broad and narrow senses, are an important factor not to be underestimated in individual's moral life.
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