The letters adapt and get selected for their suitability to English; rarely is there an attack of the "Q" or "Z" letters.
字母的适应和选择取决它们对英文的适宜程度； 很少会出现字母“Q”或“Z”。
We want to know whether a given vector field with components P, Q and R can be written as f sub x, f sub y and f sub z for a same function f.
要看向量场,能否写成，其中f是同一个函数。
The theory of folded cavity is discussed. The stable condition of Z-shaped cavity A-O Q-switched system is analyzed by transmitted matrix.
运用矩阵光学的传输矩阵理论分析了Z型折叠腔声光调Q系统稳定运行的条件。
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