Here's a way that you can do it in a test tube without using any cells by this process called Polymerase Chain Reaction.

但有一个方法可以让你在试管中完成,不用细胞,这个方法叫聚合酶链式反应

耶鲁公开课 - 生物医学工程探索课程节选

Eximbank loans made in 1985 for several meat-processing plants, copper-processing facilities, a turnkey chemical complex, a color-television tube plant, a glass funnel facility, a process computer used in steel manufacturing, and a tractor factory remain unpaid.

CENTERFORSECURITYPOLICY: Safeguarding US Equities While Aiding Poland And Hungary

The cause of the crash is still being investigated but is believed the balloon had been in the process of landing when a landing cable got caught around a gas tube and a fire erupted on board.

BBC: Egypt hot air balloon tragedy: Tributes paid to victims

According to initial indications, the balloon was in the process of landing after 7 a.m. when a cable got caught around a helium tube and a fire erupted, according to an investigator with the state prosecutor's office.

NPR: Fiery Balloon Accident Kills 19 Tourists In Egypt