trench warfare

基本解释

The trench lines of the Petersburg–Richmond theatre of operations in the final months of that war were the foremost example of trench warfare in the 19th century.
在那场战争的最后几个月里，彼得斯堡-里士满战区的壕沟体系是堑壕战在19世纪得到应用的先例。
Trench warfare is resorted to when the superior firepower of the defense compels the opposing forces to “dig in” so extensively as to sacrifice their mobility in order to gain protection.
当防守方的优势火力迫使敌方广泛“掘壕”，以牺牲机动性来获得防护力时，就会发生堑壕战。
With the advent of trench warfare in 1914, trench coats became an essential piece of the military outfit, with added epaulettes and “D” rings to enable the attachment of military equipment.
随着1914年壕沟战的出现，风雨衣成了一种必不可少的军事服装，上面有附带的肩章和D型圆环，可以用来系挂军事装备。
www.chinadaily.com.cn

An estimated 80,000 people died in the fighting, many in World War I-style trench warfare.

So, it has gotten a little better, but selling this stuff is trench warfare.
FORBES: Is Salesforce.com A Bubble In The Cloud?
As I understand it, it was old-fashioned trench warfare of a century ago, with a great many deaths.
NPR: Tensions on the Rise in Horn of Africa
The Accenture innovation engine risks a continuation of product innovation and the trench warfare that has characterized the food industry.
FORBES: Connect

a type of warfare in which opposing armies face each other in entrenched positions