If you overstretch something or someone or if they overstretch, you force them to do something they are not really capable of, and they may be harmed as a result.
例句
Dr Boutros Ghali said the operation would overstretch resources...布特罗斯·加利博士说这一行动没有足够的资源支持。Do what you know you can do well and don't overstretch yourself...做你拿手的事情，不要勉为其难。