热胀冷缩熱脹冷縮

rè zhàng lěng suō

Meaning

thermal expansion and contraction

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Characters

热rèheat, fever, zeal执灬胀zhàngswelling, inflation⺼长冷lěngcold, cool; lonely冫令缩suōto withdraw, to shrink, to pull back; abbreviation纟宿