Drive options constantly change, and how you match motor and drive affects system efficiency.

对变频器的选择经常变化，而且马达和变频器是否匹配会影响系统的工作效率。

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But analysts at Barclays Capital note that swap dealers still accounted for just 6.4% of total options and futures contracts, not enough to drive prices up on their own.

然而，英国巴克莱银行的分析家观察到，调换交易商仍然只占期权及期货合约总数的6.4%，尚不足以凭一己之力抬高物价。

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I'd be more surprised if evolution didn't drive some microbes toward figuring how to use arsenic when there are no other options.

如果别无选择时进化并没有迫使一些微生物靠砷为食我将更加吃惊。

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In pre-production testing of the Modbook Pro, Modbook Inc. found that solid-state drive options offered a number of clear advantages over mechanical drives.

ENGADGET: Modbook Pro to launch with SSD storage, up for pre-order October 3rd

The notebook's external storage options include a LS-120 SuperDisk drive (which also supports 3.5-inch floppy disks), a CD-ROM drive, a DVD ROM drive and hard disk drive options of up to 20G bytes.

CNN: Panasonic introduces 'tough' notebook PC

This is perhaps the largest driver of an options premium and overnight has helped drive the options premium up by 162% to 63 cents per contract.

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