please translate the following english sentence into chinese. divide the sentence if necessary. it is customary for the porters to send a postcard to say when they will be arriving.
下列五连音的时值相当于两个( )音符。
语音识别属于模式识别的范畴。
数据分析的4个方面包括:报表、即席查询、 、知识发现。
please translate the following english sentence into chinese. change the word order if necessary. that someone invented karaoke came as a shock to most.