The Saudi border has been perhaps more porous in the past, but with the current instability in Yemen the Saudis have certainly tightened up their controls.

过去，沙特边境可能更加疏漏，但是由于也门目前的动荡局势，沙特加强了对边境的控制。

youdao

Instability and reasons of peak current control are also expatiated.

阐述了峰值电流控制的不稳定性及原因。

youdao

Instability and reasons of peak current controlled BOOST converter are simply analyzed, basic principles of slope compensation and design problems are also expatiated.

简要分析了峰值电流控制模式升压变换器的不稳定性及其原因，阐述了斜坡补偿的基本原理和设计问题。

youdao

Since the fall of Saddam, the Americans have repeated the mantra that Iran and Syria share America's interest in bringing stability to Iraq because the current instability destabilizes them.

CENTERFORSECURITYPOLICY: The long road to victory

The prime minister said all Europe's economies, whether in the euro or not, needed a swift resolution of the current instability, and the single currency area as a whole needed to act to demonstrate it could "live within its means".

BBC: UK Politics

"The simple fact is that the chancellor has made it clear that all existing deposits in Northern Rock are fully backed by the Bank of England and are totally secure during the current instability in the financial markets, " he said.

BBC: NEWS | Business | 'Savers return' to Northern Rock