Durometer hardenss tester an instrument used to characterize the hardenss of elastomers or other rubber - like materials.硬度计—用来测定弹性体或其它橡胶物质的特性的工具.Durometer : Instrument for measuring the hardness of a resilient material,...
We do not know which behavioural traits are inherited and which acquired.我们不知道哪些行为特征是遗传的,哪些是后天养成的.How these behavioural changes come about was, until recently, obscure.这些行为改变是如何产生的至今仍让人费解.For many years behavioural econo...