constant /ˈkɔnstənt/ I. adj. 1.经常的，不断的：They received constant opinions from their customers. 他们经常收到顾客的意见。［考句］He found the constant media attention intolerable and decided to go abroad 媒体老是注意他，他觉得实在无法容忍，就决定出国了。2. 始终如一的：constant address 常住地址；drive at a constant speed 匀速驾车 3. 忠实的：sb’s constant companion 某人的忠实伴侣 ‖II. n. ［c］常数，恒量：An absolute constant is fixed and can not be changed.绝对常数是固定而不可以改变的。
constantly /ˈkɔnstəntli/ adv. 经常地，不断地：She is constantly changing her mind.她反复无常。
