
一 | (ECNS) -- China recorded improvements in both air and water quality in the first seven months of 2026, with average PM2.5 concentrations falling 6.2% year on year, Minister of Ecology and Environment Huang Runqiu said Thursday. The average concentration of fine particulate matter, or PM2.5, fell by 1.8 micrograms per cubic meter from a year earlier, while the proportion of days with good air quality increased by 3.9 percentage points, Huang said at a press conference held by the State Council Information Office. The proportion of surface-water monitoring sections meeting Grade I-III water quality standards reached 86.5%, up 2.4 percentage points year on year. Water quality in the main streams of the Yangtze and Yellow rivers remained at Grade II. (By Helen Mo, intern Yang Hongran)
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二 | 长七A火箭主任设计师魏远明介绍,本次任务长七A遥五火箭采用整流罩直径4.2米的构型,全箭高度60.1米,是长征家族最高的火箭之一。值得一提的是,长七A火箭作为我国首型采用助推器与芯一级集束式分离技术的捆绑火箭,相比以往火箭减少了一次分离环节,使火箭捆绑连杆结构更加简化。同时,集束式分离也减少了一个助推器落区,整个组合体都在一个落区内,更加有利于控制火箭残骸落区。此次任务的第二个亮点就是流程得到大幅缩减,工作效率大幅提升,型号队伍通过优化流程顺序、并行工作、合并测试等方法,将发射技术流程由32天缩减至26天。其中,总装模式由“一气呵成”改为“随到随吊”,总装时间减少3天;将具备类似状态的测试进行了一次合并“同类项”,测试时间减少2天;“串行变并行”,转场及发射区工作省下1天。6天听起来不长,但对于火箭发射来说,每一项工作都是争分夺秒,测发周期每减少一天,在火箭发射效率提高上就是向前迈进一大步。(总台央视记者 崔霞 李宁 陶嘉树 孙熙然 张雅臻 航天科技集团一院 高诗淇 桑茜 王冰 肖国军 姜文博)
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