Exciton is electron - hole pair held together by their mutual Coulomb interaction.激子就是由电子和空穴在相互间的库仑力作用下,相互维持在一起的电子 -- 空穴对.As to the emission at 370 nm, It'should result from exciton recombination radiation.而在370nm处的...
霍利菲尔德体重增到了210磅。Holyfield has bulked up to 210 pounds using weights.大部分增稠剂来源于植物。Most of the thickeners are of plant origin.用多少增稠剂?How much thickener is used?...