原级：headset
1. UEFA agreed the fourth and fifth officials were positioned behind each goal and communicate with the referee and his assistants running the touchlines through headsets.
2. headsets什么意思
2. The devices are meant to detect the signals sent to the hidden receivers and headsets from a facility outside the testing centers.
3. He wears headsets and is instructed by a computerized voice on where to go in the warehouse to gather or store products.