asymmetrical /əsiˈmetrikəl/ adj. 不均匀的，不对称的（[反]symmetrical）：asymmetrical shapes不对称的形状the asymmetrical relationship between a landlord and a tenant房东与房客之间的不平等关系ADSL is the abbreviation of “Asymmetrical Digital Subscriber Line”, ie. high-speed transmission of signals from the telephone network to an individual subscriber, but a slower rate of transmission from the subscriber to the network.  缩写ADSL表示“非对称数字用户线路”，即下载速度高于上传速度。