to put a roof (on a building), to cap the roof (finishing a building project), fig. to put a ceiling (on spending, prize, ambition etc), to top off, fig. to reach the highest point (of growth, profit, interest rates), to stop growing (of plant bud or branch)

一种落后的社会制度和思想

kite

用强制手段切断与外界的联系

weather, unstable situation

the mountain road twists around each new peak (idiom), (of a mountain road) twisting and turning, fig. an opportunity has come unexpectedly, things have taken a new turn