The sad thing is that the majority of people that are killed by malaria are children because there immune system is not strong enough to ward off this infection."

VOA: special.2009.12.22

The plane that's ready to take off or is taking off is not such a system.

但即将起飞或正在起飞的飞机并不是这种系统

耶鲁公开课 - 基础物理课程节选

It was like the off-track betting system.

这有点像场外下注。

斯坦福公开课 - 经济学课程节选

Glenn solved the problem by turning off the automatic system.

VOA: special.2009.06.17

They're start off by frying potatoes, then put the remaining oil into this system to be converted into useable energy.

VOA: standard.2010.04.25

"It is not where it needs to be. But people are no longer talking about the financial system falling off a cliff.

VOA: standard.2009.07.23

Upon descent, alarms went off telling the astronauts that the automatic guidance system was steering the lander toward a boulder-strewn crater instead of a relatively flat landing site called the Sea of Tranquility.

VOA: standard.2009.07.16

The first step uses a bit of influenza DNA to get the patient's immune system to begin fighting off the flu, and then the protection is given a "boost" some time later by the second step, which can be either another bit of DNA or a conventional flu vaccine.

VOA: standard.2010.07.21