I'll have to beg off . I have another engagement.恐怕我去不了了. 我另有个约会.We were invited to stay for dinner, but we had beg off.他邀请我们吃晚饭, 他这麽做真是太客气了.I'll try to beg off for an hour.我将设法请一小时的假....
The enterprise VINYL PRODUCTS offers among other things Compounding and PVC.VINYLPRODUCTS是一家令客户满意的企业,该企业制造杰出的调配物、调配,聚氯乙烯.The processes include washing, slicing, drying, lixiviation, concentration, compounding, disinfecti...
The gypsum slurry is pumped into a diked area.我们用泵将石膏料浆打到一块用堤围起来的空地中.Thickeners were introduced for separating the acid and gypsum.用稠厚器来分离酸和石膏.Gypsum may crystallize on the surface of the phosphate rock particles.石膏会在磷矿颗...