To see how this influences trade, consider the business of making disk drives for computers.

"想知道这如何影响贸易，可以考虑为电脑制作磁盘驱动器的业务。

youdao

This is possible only because disk drives, while valuable, are small and light and so cost little to ship.

这之所以成为可能，只是因为磁盘驱动器虽然价值高，但体积小、重量轻，因此运输成本低。

youdao

Define the disk drives.

定义磁盘驱动器。

youdao

That is, you can plug disk drives into the slots and then everything seems to work.

FORBES: Drobo: Making Storage Sexy and Very Profitable

They picked disk drives, for two reasons: There were no standards bodies dominated by big companies.

FORBES: Meet Marvell

Over 40% of all electronics manufacturing in Singapore is directly of indirectly related to disk drives.

CNN: ASIANOW - Asiaweek | Business | Short Circuits