Type echo "[Ctrl-v][Esc]]2; Hello [Ctrl-v][Ctrl-g]" at the shell prompt.
在 shell 提示上输入 echo "[Ctrl-v][Esc]]2; Hello [Ctrl-v][Ctrl-g]"。
The arithmetic formulas for sine wave, linear frequency modulation signal, V-style frequency modulation signal, white noise signal, reverberation signal and echo signal are given by their definition.
根据信号类型的定义，给出了正弦信号、线性调频信号、V型调频信号、白噪声、混响和回波信号的合成公式。
Photon echo in polarization beat spectroscopy is studied for a V-type three-level system.
利用相位共轭极化拍频光谱术对V型三能级系统中的光子回波进行了研究。
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