以下为句子列表：
英文: According to the characteristics of pinnoite in Dachaidan, a new technology of preparing boric acid with two-step sulfuric acid method was studied.
中文: 摘要针对大柴旦柱硼镁石矿特点，对酸法制硼酸进行了工艺优化研究。
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英文: All above results show that the reaction experiences the six-member ring transition state with two-step path.
中文: 这表明该反应主要经历六元环过渡态的两步反应历程。
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英文: Fight fine lines, refine pores and achieve beautifully smooth skin – immediately – with this simple, two-step set.
中文: 简单的两步曲，消除细纹，缩小毛孔，柔软肤质，立即见效！
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英文: Four-member ring and six-member ring mechanisms have been studied, both of which have three reaction paths with the main path through two-step transition state.
中文: 探讨了四元环和六元环机理，其中每种机理有三种途径，主要的途径是经过过渡态的两步反应途径。
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英文: Huilong Plastics Machinery Co.,Ltd.is a specialized company in the production of two-step automatic and semi-automatic stretch-blow molding machines, automatic thermoforming machines and various auxiliary preform, bottle and thermoforming moulds.Besides,t
中文: 慧龙塑料机械有限公司是一家融两步法全自动、半自动吹瓶机、全自动热成型机以及配套的各种瓶坯、吹瓶和热成型模具为一体的专业生产公司，同时还致力于为客户提供吹瓶机、热成型机生产线的设计、制作、安装与调试服务。
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