In an infinite dimensional space there always exist two subspaces whose vector sum is different from their span . 在一无限空间中恒存在两个子空间，其矢量和与其张成空间不同。
The increase in nominal stress due to live load, bc, is usually small in comparison with the dead load, oa . 活载产生的名义应力的增量BC段与恒载产生的名义应力OA段相比一般是很小的。
When plots of equal size are compared, the corresponding percent occurrence for a taxon is named "constancy" . 如果进行比较的是相同面积的样地，一个种出现的相应百分比就称为“恒有度”。
To maintain a continuous current, we must in some way maintain a force on the mobile charges in a conductor . 为了在导体内维持恒电流，我们必须用某些方法，使导体内的可动电荷保持受到一个力。
For gases, one has to distinguish between the changes of state which take place under constant volume and those under constant pressure . 对于气体来说，必须把恒容和恒压下发生的状态改变区别开来。
The constant species are often widely distributed species, only because of their abundance are always recurring in land samples . 恒有种是经常广布的种，就是因为它在样地里经常大量地和重复地出现。
Constant companions are added to the character taxa to form the "characteristic species combination" for associations and higher taxa . 恒有伴生种加特征种构成群丛或更高级分类单位的“特征种组合”。
Both measured income and measured consumption, the theory suggests, contain a permanent and a transitory element . 该理论提出，可计量的收入和可计量的消费二者都包含有一个恒常性的部分和一个暂时性的部分。
To evaluate fracture instability, the total sum of stresses due to residual welding or rolling stresses, dead load, and live loads must be considered . 计算断裂失稳性时，必须考虑焊接或轧制残余应力，恒载应力和活载应力之总和。
The cheapest way to get one is to invoke the spectral theorem and to conclude that normal operators always have non-trivial invariant subspaces . 取得这样结果的最省力的尝试是引用光谱定理而得到正规算子恒有非平凡不变子空间的结论。
