Latter exactly year ago of beginning the commercial deliveries of analogous in volume drives.

后者正是在一年前开始商业交付类似的零售量驱动器。

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Meanwhile, police said, Mr. Holmes had bought thousands of rounds of ammunition via the Internet and received "high-volume" deliveries by mail to his home and school, for what authorities described as an arsenal of weapons and explosives.

WSJ: Suspect's Rapid Descent