The bonds, which were introduced in 1956, are in units of one pound and are redeemable at face value on demand .

这种债券始于1956年，以一英镑为单位，需要时可按面值兑现。

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Note that the demand for trains is unlimited, so a very large value is the upper bound on line 43.

注意对于火车的需求是无限的，因此在43行上我们使用了一个很大的值作为上界。

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The concept of profit parity disregards that there are varying levels of value and increment in demand depending on the distribution channel.

但利润一体化的概念，忽略了分销渠道的不同会导致需求的价值水平和增长水平各异。

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There is a third part to the value of Monsanto, its option on increased global food demand.

FORBES: Monsanto Looks Cheap As An Option On Global Food Crisis

This dynamic feeds off itself, because as secondary bonds rise on stronger buying, relative value for new issues improves, which makes pricing come down, which stimulates greater demand and so on.

FORBES: Connect

The root issue I have with gold is that its price is based not on the present value of future cash flows but supply and demand.

WSJ: The Experts: Should the Average Investor Buy Gold?