trip.wire

tripwire的音标和读音：
DJ音标发音： [ˈtripˌwair]
KK音标发音： [ˈtrɪpˌwaɪr]

tripwire的词性：
n.（名词）

1. A wire stretched near ground level to trip or ensnare an enemy.
绊索：设置在近地面的线，用来绊倒诱捕敌人

2. A wire or line that activates a weapon, trap, or camera, for example, when pulled.
拉发线：与武器、陷井或相机相连的电线或线，当线被拉时，将启动武器、陷井或相机

3. A relatively small frontline military force whose involvement in hostilities will trigger the use of a larger force:
导火线：能引起较大的军事力量的行动的相对较小的前线的军事力量：

“a demilitarized West Bank, with an Israeli military tripwire on the Jordan”(New Statesman)
“非军事化的西岸，在约旦河边上却有一个以色列的军事导火线”(新政治家)