system upgrade的用法和样例：
例句
- You don't have to pay extra for the new OS or hassle with performing the upgrade.
你不必为新版操作系统支付额外的费用，或者遭遇系统升级的种种麻烦。 - This type of design allows parts of the system to be upgraded without affecting the rest.
这样的设计让部份的系统升级时不至于影响其他部份。
system upgrade的相关资料：
临近单词
system fan
system
system of transfiguration monitoring
System of A Down- B.Y.O.B.
system service control point service
system of responsibility for finance
system of quaternion matrix equations
system of controlling and supervising
system device of frequency conversion
system aleukemic reticuloendothliosis
system of vector equilibrium problems
system of linear congruence equations
