一、base的基本含义及用法介绍
base可作名词、形容词、及物动词，作名词时意为基础；底部；垒。作形容词时意为卑鄙的；低劣的。作及物动词时意为以…作基础。
例句：The lamp has a heavy base.
这盏灯的底座很沉。
She used her family's history as a base for her novel.
她以她的家族史作为小说的素材。
These policies have a broad base of support.
这些政策受到广泛支持。
Put some moisturizer on as a base before applying your make-up.
化妆前先搽些润肤霜打底。
I spend a lot of time in Britain but Paris is still my base.
我有很多时间在英国度过，但主要还是居住在巴黎。
After the attack, they returned to base.
他们发动攻击之后返回了基地。
They decided to base the new company in York.
他们决定将新成立的公司总部设在约克郡。
He acted from base motives.
他的行为动机卑鄙。
二、mean的基本含义及用法介绍
mean可作动词、形容词、名词，作动词时意为用意；意味着；意欲；引起；十分熟悉；严肃地说；意义重大；预示，作形容词时意为吝啬的；刻薄的；低劣的；凶狠的；平均的；简陋的；出身卑贱的；（非正式）有效的，作名词时意为 平均值；中庸。
例句：What does this sentence mean?
这个句子是什么意思？
What did he mean by that remark?
他说那话是什么意思？
Don't be upset─I'm sure she meant it as a compliment.
别烦恼我肯定她的原意是要称赞你的。
His father meant him to be an engineer.
他父亲想让他当工程师。
Do you have any idea what it means to be poor?
你知不知道贫穷意味着什么？
