没有仔细考虑

without turning a hair───毫不畏惧

get your thinking cap on───带上你的思维帽

put your thinking cap on───戴上你的思维帽

without missing a beat───一个节拍都没有错过

listen carefully───仔细听

the thinking process───思维过程

wishful thinking───n.如意算盘；痴心妄想；一厢情愿

It's no good talking without thinking carefully.───没考虑清楚就讲是不好的。

More often nowadays, people use this phrase when someone says something or does something too soon, especially without thinking carefully about it.───如今更多的是，这个短语用来形容某人说东西或做事很匆忙，尤其是不加思考地做。