double ace特级飞行员doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double screw pump双螺杆泵double fluid cell双液电池double gas-cell双气室double-entendren.双关语(其中一个有性的含义)；意义含糊double secret key密钥对double thresholds双重阈值double hare-lip双唇裂double-line pen划双线笔double helix mode双螺旋模型double gate valve双闸阀