This pushing and pulling force is called lift.

这种推和拉的力量就叫做升力。

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Changes, both pushing and pulling would detect this discrepancy and can easily be notified.

不管是推送还是拉动等变更，都可以检测到这些不一致，并容易发出通知。

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Market forces are the main determinant of this, with the old supply and demand factors pulling and pushing from their respective corners, but the web adds a little twist.

各个市场产品的投放和消耗，供应与需求，使市场的力量成为价格的主要决定因素，但是网络略有不同。

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