acceleration-deceleration unit 加速度-減速度單位; accessory dwelling unit 附屬住所單位; accumulation-distribution unit 積累-分發(fā)單位; analog-to-digi tal (conversion) unit 模擬-數(shù)字（轉(zhuǎn)換）單元
實用例句
Michael Essien, Chelsea's Ghana international, has recently spoke of Adu's potential.
