i am roasting out here翻译

这是什么歌
Chestnuts roasting on an open fire
Jack Frost nipping at your nose
Yuletide carols being sung by a choir
And folks dressed up like Eskimos
Everybody knows a turkey and some mistletoe
Help to make the season bright
Tiny tots with their eyes all aglow

英语翻译
The effects of roasting ,mass ratio of H2SO4 to stone coal ,leaching temperature ,liquid to solid ratio ,grinding fineness of stone coal ,and two stage counter current leaching coal reach 65.1% at the mass ratio of H2SO4 to stone coal of 20% .leaching temperature of 95C,leaching time of 30h,liquid to solid ratio of 1.1mL/g,and gringing fineness of 0.1 turn which can changes all experimental basis for the production from stone coal.
Nano cerium oxide films were applied 011 AA7020-T6 aluminum alloy and the effects of acetic acid concentration on the microstructure and clectroni microscopy(SEIVO,X-ray diffraction ) ,and potentiodynamic polarization methods .It has been found that by increasing the caetic acid /CeCl5*7H2O molar ratio .1 ligh yniform and crack free films with well developed grains were obtained and grain sizes of the films decreased .Elimination of cracks and decreasing grain size of the nano cerium oxide films caused corrosion resistance to increase.
A series of hepatic targeting drugs ,5-FU- cholic acid conjugate T1-T5,were synthesized .5-FU- and cholic acid was selected as starting material,after N-hydroxymethylation,condensation ,hydrogenolysis to obtain carboxylated 5-FU 5a-e .Carboxylated 5-FU 5a-e were condensated with intermediate 3-hydroxyethyl cholic acid benzyl ester 6 to get 7a-e ,7a-e were deprotected to get T1-T5.
This study assessed the treatment of azodye acid orange 7 containing wastewater by laboratory scale up flow constructed wetland with and without supplementary aeration.The supplementary aeration could effectively control the ratio of anaerobic and aerobic zones ing the UFCW reactor .The results clearly biodegradation of organic pollutants and mineralization of intermediate aromatci amines formde by AO7 degradation.
Simultaneous determination of epinephring and dopamine at 2,3-dimercaptosuccinic acid modified electrode was studied .The oxidation peaks of the mixture of EP and DA appeared ata the same potential ,but the cathodic peak currents were only linear to the concentration of DA,whereas the anodic peak currents were equal to the sum of individual anodic peak currents of EP and DA .Therefore,a novel electrochemical method for the simultaneous determination of Epand DA at a DMSA modified electrode by cyclic voltammetry was established .The DMSA self-assembled eletrode showed good sensitivity ,selectivity and stability and could be ysed to determine DA and EP ,simultaneously ,in the real application with satisfactory results.

roasted与roasting的区别
a roasting summer是正确的，为什么不说a roasted summer呢？
eat roast beef是正确的，为什么不说 eat roasted beef或 eat roasting beef呢？

那位可以给翻译一句话,是奶茶店会员卡上面的 the are of roasting is the are of cerating flavor 意思?