Terms of service: B offers two free software upgrades and the software maintenance services.
服务条款：乙方免费提供两年本软件升级及软件维护服务。
We provide free software upgrades for two years and technical services for life. our technicists will happy to make friends with every client.
可以享受两年的软件免费升级及终身的技术服务。
In free software, upgrades and patches are not a once yearly event complete with beta versions and release candidates.
在自由软件中，升级和补丁不是在beta版和RC版完成后才发生的年度事件。
Free software users expect regular upgrades and patches.
自由软件用户希望规律的升级和补丁。
We will offer software upgrades for free.
免费提供软件的升级服务。
We will offer software upgrades for free.
免费提供软件的升级服务。
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