key-on

Okay, Ron, which jokester changed the key on me?

|好，罗恩，谁改调子？

Ewing keyed a 73–35 advantage on the boards with twenty rebounds.

埃文20个篮板球成为保持73比35优势关键因素。

Methods The optometer is composed of singlechip, handle and LCD.The eyesight is examined by selecting exposure of random sample eye-chart mark E within direction keys on the handle.

采用微计算机控制视力检测仪，其由单片机、手柄和液晶显屏构成，手柄具有上下左右方向等功能键，根据手柄上按键选取随机出现视标"E"朝向正确与否来检测视力。