...包裹的表达IL-2基因和IL-12基因的真核表达质粒，对照组分别注射无目的基因的空载体和磷酸盐缓冲液(phosphatic buffered saline，PBS)。次日给予2Gy直线加速器的局部肿瘤放射治疗(简称放疗)。
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和磷酸盐缓冲液
And phosphate buffer
以上为机器翻译结果，长、整句建议使用 人工翻译 。
探讨了前药的体外释药性能，前药系统在中性和酸性磷酸盐缓冲液中均能释放出活性药物分子。
Nanoparticles were well-dispersed with spherical shape, and their surface zeta potentials were slightly positive. The kinetics of hydrolysis for drug delivery system was investigated.
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