twinter缠绕twinadj.孪生的；紧密联系的n.双胞胎之一twin scintillator双闪烁体twin-core cable双心电缆twin branch lines双分裂导线twin-tub washer双桶洗衣机twin-beam model双射束模型twin-hull craft双体船twin sickle mower双刀割草机twin-start screw双螺纹螺杆twin spark magneto双发火磁电机twin serial camera双镜连续摄影机