支持, 维持
to give help or support to something, especially an economy or a system, so that it can continue to exist
:
• The government had to prop up the failing banks.
政府不得不支持那些濒临倒闭的银行。
• Foreign aid is used to prop up the country's weak economy.
外国援助被用来支撑该国疲软的经济。