目的研究应用根尖定位仪诊断牙根纵裂。

Obiective to study the application of root apex locator to diagnose vertical root fracture.

由于屏幕较小，手机、游戏机、卫星定位仪无法取代电视机。

With their minuscule screens, mobile phones, game consoles and satnavs are never going to replace television sets.

声纳(声波定位仪)发出的声音常常刚刚达到张力的最大值。

A sonar pings just often enough to maximise the tension.

检测水压承受力的金属嘎吱作响、发出哀嚎；声纳(声波定位仪)发出的声音常常刚刚达到张力的最大值。

Metal tested to endurance creaks and groans; a sonar pings just often enough to maximise the tension.

所以，就像在潜水艇电影里拍的一样，所有的目光都盯着压力表，所以的耳朵都听着声波定位仪。

So, as in submarine films, all eyes are on the pressure gauge, all ears on the sonar.