The gas contains blow - by, sludge, acids, oil, and other contaminant.这些气体包括窜缸气体, 沉积物, 酸, 机油和其它杂质的气体.Modification of rinsing techniques by installing cascading or counter - current rinse systems increases the contaminant...
His hair is dark grey with flecks of ginger.他深灰色的头发夹杂着几缕姜黄色。His hair was dark, with flecks of grey.他的黑发间有缕缕银丝。He went to the men's room to wash flecks of blood from his shirt...他去男洗手间清洗衬衫上的斑斑血迹。I got a few flecks of...