"being in front," 1650s, of the forehead; 1971 with reference to the naked standing body; from Modern Latin frontalis, from front-, stem of Latin frons "brow, forehead" (see front (n.)). In some uses probably from front (n.) + adjectival suffix -al (1).
权威例句
1. Why is full-frontal male nudity still so scarce in films?
为什么男性正面全裸的镜头在电影里还是如此少见呢?
2. Military leaders are not expecting a frontal assault by the rebels.
军队指挥者没有想到会遭到叛军的正面袭击。
3. He pioneered the surgical technique called frontal lobotomy.
他首创了被称为额叶切断术的外科手术。
4. He launches a frontal attack on working-class organizations.
他对工薪阶层组织发起正面挑战。
5. Airbags protect the driver in the event of a severe frontal impact.