单词	起泡--泡沫--海绵
释义	泡沫；起泡；海绵foam
随便看	difficult menstruation difficult of difficult of access difficult of accomplishment difficult of approach difficult parturition difficult point difficult respiration difficults difficult temperament difficult temperament of infants difficult to difficult to advance difficult to avoid difficult to avoid a feeling of attachment difficult to avoid the feeling of attachment difficult to bear difficult to be lenient difficult to believe difficult to comprehend difficult to comprehend, difficult to distinguish difficult to effect difficult to enter difficult to enumerate