New Words：
grain [ɡreɪn] n. 谷物；颗粒；谷粒；一点儿
Sample Sentences：
There is a grain of sand in his eye.
Not a grain of rice should be wasted.
That big building is a barn for keeping the grain.
The old man loaded his grain on his donkey and left.
New Words：
palace [ˈpæləs] n. 宫殿；王宫；总统府；豪宅
Sample Sentences：
The doors of the palace were made of gold.
She's the guide who took us round the palace.
They'd bought a huge barn with some land and planned to turn it into a palace.
New Words：
mean [mi:n]
v.意味着；意思是；打算
n.平均值；平均数
adj.刻薄；吝啬的；小气的；不善良
Sample Sentences：
The mean of 7,9 and 14 is 10.
He's too mean to buy us a meal.
I'm sorry I hurt you,I didn't mean to.
They didn't mean to go and help you.
I don't understand what the word means.
New Words：
vacuum ['vækjuəm]
n.真空；真空状态；空虚；空白
adj.真空的；用以产生真空的；利用真空的
v.用真空吸尘器清扫
Sample Sentences：
No one exists in a vacuum.
I mean to buy a vacuum next month.
I vaccum the carpet twice every week.
Sound waves cannot travel through a vacuum.
mean 打算
New Words：
pepper [ˈpepər]
n.胡椒粉；甜椒；柿子椒；灯笼椒
vt.(在食物上)撒胡椒粉
Sample Sentences：
Salt and pepper the potatoes.
He burnes his tongue with red pepper.
Can you taste pepper in the pudding?
Beat eggs and add salt and pepper, mix well.