The book consists of four volumes.

这本书共有四卷。

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The four volumes compose a single book.

那四册构成一卷书。

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Another four volumes were used in an LVM for mail journaling.

一个LVM中的另外4个卷用于邮件日志。

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One of the many Starbucks outlets near The Economist's New York office is selling the Vivanno at four times its target volumes.

ECONOMIST: Innovative things to do with a banana

These reviews will focus on seven states with high populations of fraud- and error-prone providers (FL, CA, MI, TX, NY, LA, IL) and four states with high claims volumes of short inpatient hospital stays (PA, OH, NC, MO) for a total of 11 states.

FORBES: CMS Tightening the Screws on Unnecessary Procedures in Florida and 10 Other States

For the first four months of the year, overall volumes were down 7%, compared with the same period a year ago.

BBC: European car sales in first rise for 18 months