查询词典 difficult point

The researchers point out that gene flow between crops and their wild relatives is common and difficult to contain.

研究人员指出，基因与作物的野生近缘种是常见的流动，难以遏制。

The researchers point out that gene flow between crops and their wild relatives is common and difficult to contain.

科学家指出，作物和其野生亲属之间的基因流动相似，难以控制。

McCullough describes Truman's difficult decisions to use the atomic bomb, to create the Truman Doctrine, and to establish the Defense Department among others. With insights from Truman's close acquaintances, McCullough crafts a story that describes changes in the course of American history from a personal point of view.

作者描述了杜鲁门在决定使用原子弹、制定杜鲁门主义，和建立国防部等时刻的困难处境，并通过来自杜鲁门亲信的信息，用自己的观点叙述了在这段历史时期美国的变革。

However, it is very difficult for BaTiO_3-based dielectrics to satisfy the R characteristic (ΔC/C=± 15% or less) when the temperature is higher than 130℃, since the Curie point of pure BaTiO_3 is about 125℃.

另一方面，采用亚微米级的超细原料已成为大容量MLCC的工艺基础，而亚微米级的超细原料的使用又对改性掺杂剂的粒径、纯度及掺杂的均匀性提出了更高的要求。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。