In the 1960s and 1970s, most personal and corporate planes were propeller or turbo-prop aircraft, which fly at a lower altitude than jetliners.

在1960和1970年代，大部分个人和企业的飞机是飞行高度低于喷气式飞机的螺旋桨式或涡轮螺旋桨式飞机。

youdao

The US shouldn"t rely on stimulus alone to prop up the economy. It should develop a comprehensive plan to rein in healthcare cost to 12% of GDP or lower."

美国不能只依靠刺激来振兴经济，必须提出全面的计划控制保健费用到GDP的12%或更低。

youdao

It is interesting that when real estate prices were rising, the Fed did not raise rates to bring them down, but now that they are falling, the central bank feels compelled to lower rates to prop them up.

FORBES: Learn To Love Deflation, Not Dollar Devaluation

Another view promoted by the Fed is that in forcing interest rates lower we stimulate or at the very least prop up the housing market.

FORBES: No, The Bernanke Fed Has Not Ignited a Stock-Market Rally

The rescue package may over time evolve into a rolling series of soft loans, at ever-lower interest rates and increasing maturity, designed to prop up Greece and keep default at bay.

ECONOMIST: Bailing out Greece