2) the fourth defense line
第四道防线
1.
Study on the fourth defense line for Chinese power system;
我国电力系统建立第四道防线的探讨
2.
Several theoretical issues about the construction of the fourth defense line of power system
电力系统建立第四道防线的几个理论问题
3) four wire channel
四线信道
4) channel,four-wire
四线通道
6) Three defensive lines
三道防线
1.
Centered in water resources protection, to build three defensive lines (eco-restoration, eco-management and eco-protection) and eco-clean minor watersheds has become the new concept in the minor watershed management in Beijing.
以水源保护为中心,构筑“生态修复、生态治理、生态保护”三道防线,建设生态型清洁小流域的水源保护的思路,是北京市小流域治理的新理念。
补充资料:四道
【四道】
(名数)道者涅槃之道路也。乘此可到涅槃之城,故名道。道虽异,可以四种摄尽。一加行道,谓先于三贤四善根位加力而行三学之位也。二无间道,谓加行功德成就而发正智,正断烦恼之位也。不为惑而间隔,故曰无间道。三解脱道,无间道后而生一念之正智,正证悟真理之位也。为既解脱惑之正智。故名解脱道。四胜进道,解脱道后更进而定慧增长之们也。此中菩萨乘之无学,果德究竟圆满,谓之胜进道,二乘之见修无学三道,皆具此四道。见俱舍论二十五。
(名数)道者涅槃之道路也。乘此可到涅槃之城,故名道。道虽异,可以四种摄尽。一加行道,谓先于三贤四善根位加力而行三学之位也。二无间道,谓加行功德成就而发正智,正断烦恼之位也。不为惑而间隔,故曰无间道。三解脱道,无间道后而生一念之正智,正证悟真理之位也。为既解脱惑之正智。故名解脱道。四胜进道,解脱道后更进而定慧增长之们也。此中菩萨乘之无学,果德究竟圆满,谓之胜进道,二乘之见修无学三道,皆具此四道。见俱舍论二十五。
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参考词条