尽管超导电缆的前景光明,却并非尽善尽美.Promising as they are, superconducting cables aren't perfect.即使这样, 超导电缆的能量损失也仅及相应铜电缆的1/200.Even so, these wires still lose only 1 / 200 th as much power as equivalent copper conductors.你也找到主电缆的基本...
Max zips back and forth across the living room.马克斯在客厅里快速地来回走动。This coat buttons, but that one zips.这件上衣用钮扣, 那件用拉链.The jacket zips open easily.这夹克衫的拉链很容易拉开....
他在州街登上了一辆北行的有轨电车。He took a northbound trolley on State Street.售票员吹哨子, 电车停了下来.The conductor blew his whistle, and the tram stopped.这儿乘电车很近便.This place is close and convenient to the street - car....