A notation will be said to be suggestive if the forms of the expressions arising in one set of problems suggest related expressions which find application in other problems.
Problem 1: Compression is slow
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单封信件物料成本不足10元，加上人工成本约50元，但售价可达200元。这150元差价，实则为情感价值买单。
Imprisoned Iranian Nobel winner possibly had cardiac arrest