aspect ratio什么意思

aspect ratio是什么 ? rehydration ratio什么意思 strenth-to-weight ratio什么意思? ratio是啥意思 aspect 请问关于飞机设计的 aspect ratio 是啥比啥 请说明 thanks your monitor's aspect ratio of 683:384 is incompatible with digit ratio是神马意思 acid test ratio ,gearing ratio 的意思?formula? tertiary gross enrollment ratio 啥意思? debt to loan ratio 指什么? body language is an important aspect of performance.意思