A corporation can buy back its bonds by paying investors the face value (plus a sweetener).

公司可通过支付投资人债券票面价值（外加甜头）来买回自己的债券。

《柯林斯英汉双解大词典》

It is the value plus or minus something.

而是这个值加上或减去某个东西。

youdao

Put slightly differently, quality encompasses added value plus attention to detail.

与略有不同的是，质量包括增加的价值加上对细节的关注。

youdao

It's simply a summation of a country's top rates on personal and corporate income, plus value-added taxes and wealth and social welfare taxes.

FORBES: Mind the Geese

Thus he gets a payout based on a bigger principal value, plus make-up payments, too.

FORBES: The new giving game

The real Fed Funds rate averaged 3%-plus, leaving gold to drop three-quarters of its real dollar value inside 20 years, as the real value of cash-on-deposit doubled.

FORBES: Real U.S. Interest Rates Deeper Below Zero Than Even In 1970s