It’s a telegram in cipher.

这码电报。

Only the capture of an Enigma machine and the invention of radar could spur a fightback.

及后盟军成功破解德军电报机码，并明雷反击，才有所转机。

She had been posing as a diplomat, but her cover was blown when she was found sending coded messages to agents.

她表面的身分一直外交官，可被特务送码电报，暴露了真实身分。