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It means to be mindful of what you do, how and where you move, what you do to your environment and so on. Aside the topics mentioned by @Aravona (security, noise), it may mean to avoid unintended k...
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It means to be mindful of what you do, how and where you move, what you do to your environment and so on. Aside the topics mentioned by @Aravona (security, noise), it may mean to avoid unintended k...