仍然以（aN-P-C）*X%-(N+P+C)(1-X%)>0看，设N>>P，N>>C，则上述公式简化为：aN*30%-N(1-30%)>0 ，消去N，简化为：a30%-70%>0 ，即：a>2.3结论：尽...
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From the menu, you may press e on an entry to edit it, c to switch to a GRUB command line, b to boot the system, p to enter a password, and Esc to return to the menu or to the previous step.
在菜单中的条目上按 e 键将编辑条目，按 c 键切换到 GRUB 命令行，按 b 键引导系统，按 p 键输入密码，按 Esc 键返回菜单或上一步。
It is the wide application of P. C. continuous curved box-girder bridge which has become an important bridge style in the transportation infrastructure.
预应力混凝土连续曲线箱梁桥应用日益广泛，已经成为现代交通基础设施的重要桥型。
As an important component of the ecosystem of the soil microbes, involved in the complex of soil organic matter decomposition and re-synthesis, the promotion of c, n, s, p, etc. cycle.
作为生态系统重要组成部分的土壤微生物，参与土壤中复杂有机物质的分解和再合成，促进C、N、S、P等的循环。
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