4-to-1 rule
(organic chemistry) Synonym of methyl fluoride
A rule of thumb for setting up a ladder safely by positioning the legs of the ladder one foot away from the base of the wall for every four feet of height.
Alternative spelling of borscht
A county of Ireland. / A town in County Monaghan. / An Irish surname.
登る前に、4対1の法則を守って、はしごの脚を高さ4フィートごとに壁から1フィート離して設置してください。
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