本期内容：

Amazon is being sued over its smart assistant's recordings of children. Two US cases allege the firm lacks consent to create voiceprints that could let it keep track of a youngster's use of Alexa-enabled devices and thus build up a "vast level of detail about the child's life". Amazon has said it only stores data once a device-owner has given it permission to do so.

sue: vi. 控告；提起诉讼
consent: n. 同意；一致（permission）
verbal/written consent: 口头/书面同意
He gave his verbal consent to have the interview taped.
他口头上同意把采访录下来。
voiceprint: n. 声纹
print 作为后缀
footprint: 足迹
fingerprint: 指纹
keep track of: 注意到（pay attention to）
Nobody could keep track of all the winners.
没人会记得所有的这些赢家。
Sorry, I just lost all track of time.
不好意思，我忘了看时间了。
build up: 积累；逐渐增加（increase gradually）

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