saddle curve meaning in English

鞍形曲线

In ion beam - mediated total dna transformation , the total dna consisted of all of genetic information in donor , and had multilateral effects on recipient , so there was no common rate of transformation to measure its effect , which meant that it was very difficult to decide an optimum condition of transformation such as influence . implantation experiments showed that the relation between the influence and survival of a . thailand was a saddle curve
在离子束介导外源全dna转化中，外源全dna包含有供体的所有遗传信息，这些外源片段对受体的影响是多方面的，因此转化效果无法用统一的转化率来衡量，这就给最佳转化条件(主要是转化剂量)的选择带来了很大的困难。