Barkla
巴克拉 (①姓氏 ②Charles Glover, 1877-1944, 英国物理学家, 曾获1917年诺贝尔物理学奖)
🗣️ 情景例句
Their after-sales service was just so bad that I decided to never buy anything from that shop again.
他们的售后服务太差了，所以我决定从此不再能家商店买东西。
Arthur must send that letter soon.
亚瑟，你必须立刻投递那封信。
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。