您要查找的是不是：
- real negative coefficient 实负系数
- positive and negative coefficient 正负系数
- Negative coefficients occur where there is a decrease in acoustic impedance across the reflecting interface. 当反射界面上下两侧的声波组抗降低时，反射系数就会出现负值。
- Negative coefficients occur where there is a downward decrease in velocity and density: for example, at the top of an over pressured shale diapir. 只有当速度和密度向下减少时，例如在超压页岩穿刺体的顶部，反射系数才会出现负值。
- Chapter two, we consider the existence of bounded nonoscillatory solutions of higher-order neutral differential equations with positive and negative coefficients. 第二章讨论了具正负系数的高阶中立型微分方程有界非振动解存在的充分条件。
- A simple test will show if this is real gold. 简单的试验就能证明这是否是真金。
- That's where the real danger lies. 这正是真正的危险所在。
- In this paper, the oscillation of forced neutral difference equations with positive and negative coefficients is studied and two sufficient conditions of this equation to be oscillatory are obtained. 摘要研究了一类具有强迫项正负系数中立型差分方程的振动性，获得了方程振动的两个充分条件。
- That new shopping centre is a real eyesore. 那个新的购物中心真是难看极了。
- That old block of flats is a real eyesore! 那座旧公寓真不顺眼！
- It's a real hassle to get this child to eat. 使这孩子吃东西，真要费九牛二虎之力。
- She sent me a real snorter of a letter. 她给我寄来一封异乎寻常的信。
- Sheila's dad is a real tight wad. 希拉的父亲真是个一毛不拔的铁公鸡。
- What was the real reason for your absence? 你缺席的真正原因是什么？
- ON UNIVALENT FUNCTION WITH NEGATIVE COEFFICIENTS 关于某类负系数的单叶函数
- His writing contains some real goodies. 他的作品中含有真正引人入胜的东西。
- Positive and negative coefficients 正负系数
- This survey is the work of a real professional. 这份调查是真正内行人做的。
- He made a real pig of himself at the restaurant. 他在餐厅里大吃大喝，真丢脸。
- I've always had a real soft spot for him. 我一向对他挺有好感。
