A box made of steel is stronger than one made of wood. ⑧倍数表达法。(A)A is three(four, etc.)times the size(height, length etc.)of B.这座新楼是那座旧楼的四倍大(高)。The new bui9lding is four times the size(the height)of the old one.这座新楼比那座旧楼大三倍(高三倍)。