(organic chemistry) cyclobutane

切開: incision, operation, section / 石灰: (chemistry) lime / 石階: / 石塊: stone, rock, pebble / 狭匙, 切匙: / 雪塊: / 節介: meddlesomeness, nosiness, interference, officiousness / 説戒:

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Chișinău (the capital city of Moldova)