polar bond是什么意思

用法例句

According to the value of i,chemical bond A-B will be divided into 11 grades equally, in which ionic bond accounts for 4 and polar bond for 7.

提出了新电负性标度Ψ′;提出了化学键A-B离子性的计算公式i=1-ΨA′/ΨB′,i值能把键A-B等分成11个等级,其中离子键占4个等级,极性键占7个等级。