learn the ropes แปลว่า

"Work slowly and cautiously until you have learned the ropes."

"When he [Abraham Lincoln] became President he was without any considerable experience in public affairs; nor was he much versed in history, whose lessons would have been most valuable. As he became more familiar with the place, his facility evidently increased. He had "learned the ropes," so he said."

"He thinks he needs no education for that work; it is just as natural to him as it is to eat and drink; and he is ready at once to undertake the management of the largest retail house in town, only needing to be shown a day or two, "till he learns the ropes.""