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- DDTs in soil were extracted with acetone/hexane (1:1, v/v) using ultrasonic extraction and removed many polar matrix components using primary secondary amine (PSA) effectively for the purity. 样品用丙酮/正己烷(1:1,v/v)超声波提取,然后用固相材料吸附净化,用GC-MS(选择离子方式)测定。
- The two systems of government are polar opposites. 这两种政体正好相反。
- Most insect do not live in polar region. 大多数的昆虫不在极地地区生存。
- A term sometimes applied to a stylus in a thermal matrix printer. 有时用来指热敏点阵打印机的触针的一个术语。
- Are there any animals in the polar circles? 南极圈和北极圈内有动物存在吗?
- Located or found in one of the Polar Regions. 环极的,围绕极地的位于或发现于一个极地区域中的
- In spite of vigilance a polar bear escape from the zoo. 尽管警戒很严,北极熊还是逃出了动物园。
- The number of rows or columns in a determinant or matrix. 行列数行列式或矩阵中行或列的数目
- polarity matrix 极性矩阵
- The polar region is the habitat of the polar bear. 北极地带为北极熊的栖息地。
- Note the polarity of the voltage drop across R. 注意R上电压降的极性。
- Although they can swim, the polar bears are terrestrial animals. 北极熊虽然会游泳,但也是陆栖动物。
- A matrix used in constructing a symbol or character image on a display screen. 用来在显示屏幕上构造出一个符号或字符图象的一种点阵。
- In spite of vigilance a polar bear escaped from the zoo. 尽管警戒很严,北极熊还是逃出了动物园。
- The polar bear's habitat is the icy waters of the Arctic. 北极熊的栖息地是冰冷的北极海域。
- Love and hatred are polar feelings. 爱与恨是完全相反的感情。
- Extending across or crossing either of the Polar Regions. 横越极地任一个横越或穿过两个极地地区中的
- The uniform matrix of hyaline cartilage. 透明蛋白透明软骨的母体组织
- The basis matrix B is unimodular. 基矩阵b是幺模的。
- A polar bear has a preference for cold weather. 北极熊喜欢寒冷的天气。