The free volume properties of high impact polystyrene (HIPS)-low density polyethylene (LDPE) blend have been investigated by means of positron annihilation lifetime spectra (PALS).
不同组成的高冲聚苯乙烯（HIPS）和低密度聚乙烯（LDPE）共混物的正电子湮没寿命谱被测量，结果表明HIPS和LDPE是不相溶共混物。
Within the Tides (1915) was the last volume of short stories published during Conrad's lifetime.
《潮汐之间》出版于1915年，是康拉德生前最后一部短篇小说集。
Within the Tides (1915) was the last volume of short stories published during Conrad's lifetime.
《潮汐之间》出版于1915年，是康拉德生前最后一部短篇小说集。
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