by leaps and bounds的音标：...

非常迅速，突飞猛进，连跑带跳...

know no bounds的音标：...

adj.（书籍）精装的（即硬封面的）...

In male company, perhaps he did overstep the bounds of propriety.在清一色男性的公司里，可能他的举止确实有失得体。The passion of Argentinian football fans knows no bounds.阿根廷足球迷极为热情。Changes in temperature occur slowly and are constrained within ...