covet a little and lose a lot; go for the small things and miss things that are worthwhile; penny-wise and pound-foolish; seek small gains but ineur big losses
? 這個(gè)笨蛋總是自作聰明，實(shí)際上～。This silly fellow always thinks himself clever. Actually he only makes small gains but incurs big losses.
貪小失大
covet a little and lose a lot;seek small gains but incur big losses;be penny-wise and pound-foolish
貪小失大tān xiǎo shī dà
形容貪圖小便宜而造成大的損失。covet a little and lose a lot, seek small gains but incur big losses, penny wise and pound foolish