Each generation surpasses the preceding one.一代更比一代强.Thus continuous coiler unwinds the wire from immediately preceding block to give a dead cast coil.这样连续缠卷装置能展开刚刚从前一鼓轮处获得的金属线,并将其固定缠绕.Repeat the exercises described in th...
Stem cells a lesson from dedifferentiation.干细胞:从脱教训.The rest of phloem also produced callus through dedifferentiation. In addition, there was callus from xylem.残存的韧皮部也可以脱分化形成愈伤组织, 此外, 还存在愈伤组织源于木质部的情况....
He would stay for hours at a stretch in the laboratory.他在实验室里一蹲就是好几个小时.Can you work ( for ) six hours at a stretch?你能连续工作六小时 吗 ?Today I really swam to my heart's content . I did 3,000 metres at a stretch.今天我一口气游了三千米...