1. buff up
提高;擦亮
仿I'm just trying to buff up my listening skill.
2.canopy ? ? ? ? ? ? ? ? ? NOUN
a cover that is fixed or hangs above a bed, seat, etc. as a shelter or decoration （牀、座位等上面的）罩篷秃臣，遮篷毅往，罩蓋
a layer of sth that spreads over an area like a roof, especially branches of trees in a forest 頂篷铃剔；天篷嵌言；（尤指森林裏）天篷似的樹(shù)蔭
a roof that is supported on posts and is sometimes also attached at one side to a building （有時(shí)與建築的一側(cè)相連的）天篷苹丸，遮篷
仿We can see the canopy of twinkling stars.
3.Summary
Ron complained to Harry about his detention. Harry also told Ron what he had heard in the Lockhart's office .They have no clue about the sound.
