To move an arm, the brain sends a message that causes the chest muscles to tighten.

VOA: special.2009.03.10

So that would mean that the Fed should be raising interest rates to try to tighten up the economy and bring the inflation rate down.

所以，这意味着,美联储应该提升利率,以试图加强经济,并且将通货膨胀率降低。

耶鲁公开课 - 金融市场课程节选

Yet,the movement is limited, and requires the person to tighten muscles in the back or arms.

VOA: special.2009.03.10

Some plants' pores can tighten to save water during conditions of high carbon dioxide.

VOA: special.2010.01.26

If you have less money than usual, you may have to tighten your belt.

VOA: special.2010.05.02

Now,scientists know how these tiny pores tighten in plants.

VOA: special.2010.01.26

The muscles in the airways tighten.

VOA: special.2009.07.28

The Lisbon Treaty is set to tighten the existing structure of the European Union to strengthen its leadership and international clout.

VOA: standard.2009.10.02

Banking lobbyists argue the bill will hurt families and businesses because it will force banks to tighten credit.

VOA: standard.2010.03.16

The United Nations,African Union, the United States and former colonial power France have all criticized President Tandja's move to tighten his grip on power.

VOA: standard.2009.11.14

In the meantime, officials from Kabardino-Balkaria told President Dmitri Medvedev that steps are being taken to tighten security at other strategic facilities in the republic.

VOA: standard.2010.07.21

"Action has also been taken in Britain,America and Australia, and many other countries to tighten financial regulation and we are bringing regulatory structures into line with the reality of global 21st century financial markets,"

VOA: standard.2009.03.30