以下为句子列表：
英文: 4 High lead and high tin copper alloy powders: 24-1，7-7-3，10-10 etc. Apparent density and particle size distribution is adjustable.
中文: 轴瓦材料用的高铅、高锡铜合金粉：24-1，7-7-3，10-10等；松比可调，粒度分布可调。
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英文: A deformational particle with oil-soluable property is used as a bridge plug to build a shielding layer in the oil-gas reservior channel, to prevent the pollution caused by drilling mud entering the reservior due to the pressure difference, and so to prot
中文: 摘要用一种具有油溶性质的可变形粒子做桥塞物，在油气储层通道中建立桥堵屏蔽层，防止由于压差造成钻井泥浆进入储层而形成污染，从而起到保护油气储层的作用。
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英文: A formula is proposed for calculating the sand content of different size in the case of matching particle size of sand, thus obtaining the correlation between ultrasonic attenuation and density of solid particles in the pulp, as well as particle size.
中文: 提出了在矿砂粒径尺寸级配情况下的不同粒径时的矿砂含量的公式，并由此得到了超声波衰减与矿浆中固体颗粒浓度、粒度之间的关系。
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英文: A hypothetical particle postulated to be the quantum of gravitational interaction and presumed to have an indefinitely long lifetime, zero electric charge, and zero rest mass.
中文: 引力微子一种假想粒子，被假定为引力相互作用的量子，并被推测为具有无限长寿命、零电荷和零静止质量
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英文: A kind of particle swarm optimization method with the characteristic of logical time-sequenced is proposed and applied to procedure parameters optimization of semiconductor assembly product line.
中文: 摘要提出一种具有逻辑时序特征的微粒群优化算法，并将其应用于半导体封装生产线的工序参数优化中。
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