to make sth continue for some time without becoming less 使保持；使持续◆a period of sustained economic growth 经济的持续增长时期◆a sustained period of falling prices 价格的持续下降时期◆We have enough cash to sustain the business for a year. 我们有足够的资金使公司维持一年（的运作）。
to experience sth bad 遭受；经受；蒙受◆The company sustained massive losses. 公司蒙受了巨大的损失。
to provide evidence to support an opinion, a theory, etc. 证明；证实◆The evidence is not detailed enough to sustain his argument. 证据太笼统，不足以证明他的论点。
() to decide that a claim, etc. is valid 认可；准许；确认；支持