The nature of the reactions involved in the conversion of shikimate to chorismate in plant is unknown . 植物中从莽草酸变为分支酸这一段反应的性质仍是不清楚的。
Planetary astronomy is no longer just one branch of astronomy, but has spilled over other fields . 行星天文学已不再是天文学的一个分支，而是与其他学科结合在一起了。
The study of projections from the cartographical point of view is not here considered as a branch of geodesy . 从制图学的观点来研究投影，不认为是大地测量学的分支。
This sector of research has been even less successful in attracting new talenta than all other sectors of agriculture . 在整个农业领域中，这一研究分支对年轻人才的吸引力较差。
The point at which branching of the graph occurs is called a bifurcation point and corresponds to a critical value of the load . 图上发生分叉处的点叫分支点，它相当于荷载的临界值。
Geometry, the first branch of mathematics that was brought to a sophisticated level, is based simply on the idea of length . 几何学是数学中最先提高到精湛水平的一个分支，它仅仅建立在长度概念的基础上。
Because of this underlying unity of physics, progress in one subfield usually illuminates other subfields as well . 由于物理学的这种根本上的统一性，在一个分支学科中取得的进展通常也会启发其它分支学科。
At every ramification from here on there is a evolutionary choice between alternatives that affect the whole life of organisms . 从这里分出的每一个分支上，有一种影响整个有机体生命的两种可能之间的进化选择。
Astronomy, like all branches of science, advances by testing theories, and not all astronomers agree with ours . 就象科学的一切分支一样，天文学也是靠一些尝试性的理论来推进的。并不是所有天文学家都同意我们的看法。
