hktrader In my mind, they have similar meaning that telling people not to care so much on an issue. Yes. hktrader My question is, are they interchangeable and formal enough to use in daily conversation?
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hktraderIn my mind, they have similar meaning that telling people not to care so much on an issue.Yes.
hktrader My question is, are they interchangeable and formal enough to use in daily conversation?Daily conversation is the epitome of informality.
hktrader Don't worry. It won't be difficult
hktraderMy question is, are they interchangeableIn your example the meaning is about the same, but in some other sentence contexts you cannot directly replace one with the other. For example, you cannot say "Don't worry that we will take every precaution" in place of "Rest assured that we will take every precaution."