to run in parallel without hindrance / not mutually exclusive / two processes can be implemented without conflict
独龙江
Dú lóng jiāng
Dulong river in northwest Yunnan on border with Myanmar, tributary of Salween or Nujiang 怒江, sometimes referred to as number four of Three parallel rivers 三江並流|三江并流, wildlife protection unit
38th parallel / dividing line agreed at Yalta between US and Soviet zones of influence in Korea, now the DMZ between North and South Korea
三江并流
Sān jiāng bìng liú
Three Parallel Rivers National Park, in mountainous northwest Yunnan World Heritage protected area: the three rivers are Nujiang 怒江[Nu4 jiang1] or Salween, Jinsha 金沙江[Jin1 sha1 jiang1] or upper reaches of Changjiang and Lancang 瀾滄江|澜沧江[Lan2 cang1 Jiang1] or Mekong
卡西米尔效应
Kǎ xī mǐ ěr xiào yìng
Casimir effect (attraction between two parallel metal plates due to quantum mechanical vacuum effects)