The indenture contract was a device that enabled people to pay for their passage to America by selling their labor to someone in the New World for a specified period of time.

契约是使人们以向新大陆的某个雇主在一段时间里出卖劳动力的方式来支付其赴美旅费的手段。

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Best-selling books are frequently not lending-enabled.

FORBES: A Pretty Good Solution To The Problem Of E-Book Lending (Or At Least I Think So)

Yet many new processes, such as selling software as a service via the internet, have in turn enabled other innovations.

ECONOMIST: Promoting innovation