In this way, you don't purchase the software but simply lease it on an as-needed basis.
这样一来，您就不必购买软件，只需随需租用软件。
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In May 2007, the airline announced lease agreements for eight new airplanes followed by a direct purchase agreement with Boeing for 42 Next-Generation 737s, announced in August 2007.
To purchase, take on lease or in exchange, hire or otherwise acquire real or personal property and rights or privileges, and to construct, maintain and alter buildings or erections.