set up a pole and see its shadow-get instant results; produce an immediate effect ❍ 学习要循序渐进，不可能～。In our studies we should follow in order and advance step by step. It is impossible to produce immediate effects.
立竿见影li gan jian ying
set up a pole and you see its shadow—do sth. to get instant results
立竿见影
set up a pole and you see its shadow—do sth to get instant results; produce an immediate effect
立竿见影lì ɡān jiàn yǐn
把竹竿竖在太阳下，立即就可以看到影子。比喻见效很快。get instant results, produce instant results, act like a charm, work overnight, get quick results