a hint of sadness 淡淡的忧伤 ； hint，暗示，线索
a gleam of light，微弱的光线；一线光明；一点线索 ；gleam，微光
a lovely peal of laughter 一阵清脆的笑声
queer idea 奇怪的想法
reveal ，vt，显示，显露 ；Everything was revealed to me .
for instance=for example 举个栗子
irritate ，vi，引起恼怒；vt，激怒 ; it irritated me very much 这让我很恼怒
the impenetrable mystery of presence 神秘的存在；impenetrable，不可理解的；mystery，神秘；presence，存在
He tossed his head gently 他微微地点头 ； toss，投掷
He sank into reverie 他陷入沉思 ；reverie，幻想，沉思，白日梦 ；sink→sank
He buried himself in the contemplation of his treasure.他看着他的宝贝入了神；contemplation,沉思，注视；treasure ，宝物
The thing that is so good about the box you have given me is that at night he can use it as his house.
the box (that )you have given me 定语从句
that is so good about the box you have given me 作定语从句修饰The thing.