Sollar
[采矿]竖井梯子间平台, [建]敞亮阁楼间, 敞亮顶楼层
🗣️ 情景例句
He's writing to invite me
他写信邀请我
The on-looker sees most of the game.
旁观者清。
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。