American SEG defines seismic record polarity as SEG normalpolarity and SEG reverse polarity.
美国SEG协会把地震剖面的极性规定为SEG正常极性和SEG反正常极性。
2
Normal cells form similar, well-organized acinar structures in vitro, whereas in highly metastatic epithelial cell lines these structures are disorganized and lack polarity.
体外试验中，正常细胞形态相似，腺泡结构排列整齐，然而那些高侵袭的上皮细胞系的结构紊乱并且失去极性。
3
Due to the high polarity of vinyl ester chemistry, it is known to be difficult to control the rheology with normal thickening additives or hydrophilic fumed silica.