Wallwashers
(wallwasher 的复数) n.(照明墙面的)墙照明装置
🗣️ 情景例句
Would two o'clock be acceptable?
两点钟合适吗？
Yes, I've just come back from Scotland.
是的，我刚从苏格兰回来。
This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.
这种通讯联系要靠21厘米波段，即每秒1420兆周的精确无线电频率。