Caesium clock
铯钟
🧩 词语组成解析
[医] 铯(55号元素)
clock
[klɑk]
n. 钟，时钟;计时器;秒表;仪表;
vt. 记录（时间或速度）;测…的速度;
vi. 打卡;记下时间;
🗣️ 情景例句
Now stand up, please.
现在站起来。
I'm going to but two gallons.
我要买两加仑。
One is the general atmosphere of secrecy in which it is carried out,
一是科研工作中普遍存在的保密气氛；