The results showed that pine needle contains kaempferide andpercent 22 % before hydrolyze, 0.42 % after hydrolyze.结果表明,松针中含有山奈素,且水解前22%,水解后的含量为0.42%....
这钢的韧度正合适.The temper of the steel is right.采用钢的连续浇铸法很重要.Of great importance is the introduction of continuous steel pouring.钢的硬度比铝高.The temper of steel is higher than that of aluminium....