- milking system
- 挤: crowd; pack; cram
- 乳: give birth to
- 作业: school assignment
- 系统: system
- 作业系统: (ibm) os; dnix; oc operation system; operating system os; os x; os/mvt; os/operation system; os/vs; os/warp; personal computer-disk operating system; pick; system, operating (os); work system
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