It's used for recording letters onto magnetic tape for transcription by a secretary.

用听写机将信件录到磁带上，再让秘书抄写下来。

youdao

U. S. officials have implied Russia may be involved in the leak of the recording, which features voices resembling those of Assistant Secretary of State Nuland and U.

美国官员暗示俄罗斯可能跟录音泄露有关，其中的声音听起来像是美国助理国务卿卢岚和美国驻乌克兰大使皮雅特。

youdao

The recording notes that the Obama administration includes key figures from the previous Bush administration, including Defense Secretary Robert Gates.

VOA: standard.2009.09.14