Some investors worry that Americans are not doing enough to lift the world's largest economy out of recession.

VOA: special.2009.08.21

You're taking the air inside of the pump and you're compressing it. You're doing it so fast that there's not enough time for heat to come out of the gas that's inside the pump towards the walls of the pump.

你把空气吸进气筒里并且压缩它,你的动作很快以至于,没有足够的时间让热量,从气筒里面跑出来,传递到气筒壁上。

麻省理工公开课 - 热力学与动力学课程节选

It accused the colonial government, for example, of not doing enough to protect ships from pirates.

VOA: special.2009.04.20

The study found that many schools are not doing enough to get students interested in bioscience or to prepare them to study it in college.

VOA: special.2009.10.15

according to Al Baghdadia TV. One demonstrator complained that the Iraqi government was "not doing enough to protect its citizens."

VOA: standard.2009.08.29

Investor sentiment continues to sour over concerns that European countries are not doing enough to tackle their national debt.

VOA: standard.2010.05.17

But Congressional Republicans say the president is not doing enough In a written statement, to create jobs.

VOA: standard.2010.01.25

U.N.spokesman Gordon Weiss tells VOA News the Sri Lankan government is also not doing enough to avert such tragic losses of civilian life.

VOA: standard.2009.05.11

like many Rwandans, blames the international community for not doing enough to stop the genocide.

VOA: standard.2009.04.08

But a new study finds that many schools across the United States are not doing enough to motivate or prepare students to pursue bioscience studies in college.

VOA: standard.2009.11.25

"But then they keep sitting there, and they are not doing enough.

VOA: standard.2009.12.05

The Obama administration has been especially attuned to criticism that it is not doing enough for small business, and focusing too much on helping big corporations and financial firms.

VOA: standard.2009.03.16

Delegates in Spain hit a major stumbling block Tuesday when the African group pulled out of some climate talks, saying rich nations are not doing enough to tackle climate change.

VOA: standard.2009.11.04

The peace dialogue had lowered tensions between the rivals, but has flagged amid repeated Indian accusations that Pakistan is not doing enough to clamp down on terror groups operating from the country.

VOA: standard.2009.10.28

Today,the number is still 40 percent. Part of the problem is that a number of big importers, such as China and Japan, are not doing enough to stop the import and sale of illegal timber.

VOA: standard.2010.07.28