What if the Service contract changes?
如果服务契约改变了呢？
He negotiated contract changes with private bus firms; there are now more buses, more flexible bus routes and less congestion on the metro.
他和私营公交公司谈判修改了合同，现在有更多的公交车，更灵活的线路，更少的地铁拥塞。
The market value of a futures contract changes daily as the market price of the security to be exchanged moves over time.
由于被交易的证券的市场价格不断地随着时间变化，期货合约的市场价值也每天都发生变化。
The market value of a futures contract changes daily as the market price of the security to be exchanged moves over time.
由于被交易的证券的市场价格不断地随着时间变化，期货合约的市场价值也每天都发生变化。
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