傻劲儿 meaning in English

1.(傻气)foolishness;stupidity
2.(单凭力气干) childish enthusiasm; with sheer enthusiasm; be foolhardy 短语和例子
不能光靠傻劲儿, 得找窍门。 enthusiasm alone won't do. you've got to work skilfully. 这小伙子干活有股傻劲儿。 that youngster works with a will