become unstable
同义词：destabilize
make unstable
If businesses know that Government borrowing is rising to unsustainable levels they know that will de-stabilise our economy and so they're going to be wary about playing a more active role in that economy.
BBC: In full: Cameron's economy speech
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。