- milestone payments
- 按: press; push down
- 里程碑: milepost; bosom; milestone
- 付款: pay a sum of money
- 里程碑: milepost; bosom; milestone 历史的里程碑 a milestone in history; 这部著作是现代科学发展史上著名的里程碑之一。 the book stands out as one of the notable landmarks in the progress of modern science
- 发展里程碑: developmental milestone
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