Calcium carbonate occurs in the allomorphs calcite and aragonite.同质异晶的方解石和文石中含有碳酸钙.The chemical composition of the melo shell is calcite and aragonite.美乐贝的化学成分是方解石和文石.Aragonite and magnesium calcite are more soluble than...
In the dry - combed process, backwashing occurs after combing.在干式精梳过程中, 复洗是在精洗之后.Backwashing is one of the Methods: To maintain a filter bed clean.反冲洗是保持滤床清洁的方法之一....
He was struck by a stabbing pain in his midriff.他突然感到腹部一阵剧烈疼痛。She accused her colleagues of bullying and back-stabbing.她指责同事恃强凌弱，暗箭伤人。A few searchlights went stabbing through the dusk and then faded.几盏探照灯戳穿夜幕,接着又熄了....