But the unpredictable effects of such operations mean they will not be the principal method by which the Fed tightens monetary policy.

但这些操作会造成何种影响难以估计，因此不太可能成为美联储的主要货币紧缩手段。

youdao

Justice seems to mean adhering to the principal, justice in the city, adhering to the principal of division of labor.

正义似乎意味着谨守本份，城中正义，谨守着劳动区分的主要原则。

youdao

A fatal illness had kept the boy home, but he had been inclined to met me, and the principal knew it would mean a great deal to him.

一种致命的疾病把这个男孩困在家里，但他想见我一面，校长知道这对他来说意义重大。

youdao

Justice seems to mean adhering to the principal, justice in the city, adhering to the principal of division of labor.

正义似乎意味着谨守本份，城中正义，谨守着劳动区分的主要原则。

耶鲁公开课 - 政治哲学导论课程节选

In some cases, this may mean losing a bit of principal if investors haven't incurred enough interest to cover a CD's early-withdrawal penalty, notes Greg McBride, senior financial analyst at Bankrate.com.

WSJ: Expecting the Unexpected When

The distances between principal cities in the region mean that it can support many hubs.

FORBES: Dogfight

As this chart shows, managers still expect that over the next 21 months default rates will revert toward, but not all the way to, the historical mean of 3.5% by principal amount.

FORBES: Connect