那么信用证的种类又有哪些？他们的各自作用又是为何？
What are the different types of letters of credit and how are they used?
讨论单轴晶体中三阶非线性自作用极化强度矢量的计算。
The third-order nonlinear polarization for self-interaction in uniaxial crystals is dealt with.
本研究试图证明元认知和考试焦虑在口语考试中的各自作用。
The present study attempts to prove the respective role of metacognition and test anxiety in oral English tests.
现在亚洲太平洋区域机制不少，都发挥著各自作用，但不解决一些现实问题。
Now quite a number of mechanisms in the Asia-Pacific region, have each played a role, but does not solve some practical problems.
数值实验表明该方法能够大幅提高自作用和近作用阻抗矩阵元素的计算精度。
Numerical examples demonstrate that the presented method can greatly increase the accuracy of calculation of the self-interaction and near-interaction impedance matrix elements.
本文论述了在高等学校课程建设中，学校教学管理部门和院系、专业的各自作用。
This paper describes the respective functions of school's teaching administrative department and school departments and specialties during the college curriculum construction.
目前工厂生产的主导产品有：波纹管密封截止阀、自由浮球疏水阀、先导式减压阀、气动调节阀、自作用式温控阀、汽水分离器等。
The chief products include: Bellows seal globe valve, Free-float steam trap, Pilot pressure reducing valve, Pneumatic control valve, Self-acting temperature-sensing valve, Cyclone separator etc.
目前工厂生产的主导产品有：波纹管密封截止阀、自由浮球疏水阀、先导式减压阀、气动调节阀、自作用式温控阀、汽水分离器等。
The chief products include: Bellows seal globe valve, Free-float steam trap, Pilot pressure reducing valve, Pneumatic control valve, Self-acting temperature-sensing valve, Cyclone separator etc.
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