overambitious
adj. 野心过大的；（计划、任务等）所需投入过大的（因而未成功或成功机会甚微）
例句
Her plans were overambitious.
她的计划都过于宏大。
《牛津词典》
But while the Serbs believe they can get candidate status, a date to start talks seems overambitious.
塞尔维亚人认为他们能得到候选成员国资格，但马上约定进行入盟会谈看起来可是有些不切实际了。
Groupon has stumbled since filing to go public this past June, using accounting methods some found overambitious.
自从今年6月申请上市以来，Groupon并不顺利，有人认为它的会计方法过于雄心勃勃。
