Interest payments and principal security appear adequate for the present but certain protective elements may be lacking or may be characteristically unreliable over any great length of time.
目前，看来仍足以支付利息与保障本金，但是若干保持因素可能缺乏，或经长时间以后，可能无法信赖。
Principal requirements for flame plume length in end port glass-melting furnace were set forth.
提出了对马蹄焰池窑内最佳火焰长度的要求。
Focal length: The distance between the centre of a lens and its principal focus.
焦距：镜头中心与其主焦点的距离。
Starting from the ray path equation, object-image relationships are found and used to determine the equivalent focal length and the principal planes of tapered GRIN fiber.
本文从光线轨迹方程出发，推导了锥形梯度折射率纤维的物像关系式，并得出了它的等效焦距和主平面位置。
If sampling length doesn't adapt rotative velocity, the results of calculation by FFT or periodogram analysis will lead to pseudo-periods, which distorts the principal value function terms.
若采样长度与回转速度不吻合，将会出现伪周期，使主值函数项中提取周期成分后的信号失实。
The cost of borrowing, or the return on lending money. It is calculated on the amount borrowed or lent(the principal), the length of time the funds are borrowed for, …
单利的计算取决于所借款项或贷款的金额（本金），资金借用时间的长短及市场一般利率水平等因素。
A multi-wave-length extinction detection method for dust is put forward. Then the principle and a principal designing scheme are given.
介绍了多波长消光法测尘的测量原理。分析了计算机辅助粉尘检测系统和工作原理。
Methods The automatic infusion alarm device was subtly reformed according to the principal of the character of the spring that the different gravity caused its length to be different.
方法：该输液自动报警器利用了弹簧受力拉升，不同质量的物体使弹簧长度改变不同的原理，巧妙地将弹簧秤进行了改装。
The formulas for determining the equivalent focal length, principal planes, focal planes as well as the GRIN lens law are derived.
导出透镜的等效焦距，主面、焦面位置以及高斯成象公式。
Focal length is the distance between optical centre and principal focus.
焦距就是镜片中心和焦点之间的距离。
Focal length is the distance between optical centre and principal focus.
焦距就是镜片中心和焦点之间的距离。
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