英语问题1.start off as/grow out of/develop from/都可表”起源于“：date fr

1date back to可追溯到; date from从某时期开始(有)
语感稍有不同,前者和现在也有联系,而后者没有表明是否与现在有关.
例如:
This kind of music dates from the 18th century.
这种音乐可追溯到18世纪.
The church dates back to 1173.
这座教堂从1173年就已存在.
2这里我再+几个容易混淆的词
辨析common 、ordinary、normal、usual、frequent以及general:
1) common “普通的”,“平常的”,“共有的”,指从质量或品德上无特殊,显眼或杰出之处,因而是大多数人或事物所具有的,常见的.
It’s an error quite common among schools.
This flower is common in spring.
2) ordinary 指符合一般或常规事物标准或相同的规格,因而只具有普通的特性.例如：
Although he is rich,he is always in ordinary dress.
common与ordinary基本同义,强调“平凡的,普通的”,表示随时可以碰到,不值得惊奇.如：
an ordinary ( a common) event 常有的事情
an ordinary (a common0 person 一个普通的人
3) normal 表示“正常的,常态的,正规的”,相对于非正常而言.例如：
Do you know the normal temperature of the human body.
His growth is normal for that age.
4) usual 通常与人的行为习惯有关,含义为“惯常的,通例的”.例如：
Tea is considered to be the usual drink of British people.
He arrived later than usual.
5) frequent 经常发生的；频繁的（事）.例如：
Frequent failures did not affect his morale.屡次失败都没有使他泄气.
Rains are frequent here in early summer.这儿在初夏季节常下雨.
在表示人的名词前用frequent表示：常见的.例如：
a frequent caller [visitor] 常客
6) general 意为“普遍的”、“一般的”,与高级想对应.例如：
This book is intended for the general reader,not for the specialist.这本书是为一般读者写的,不是为专家写的.
3kind n.（名词）
A group of individuals linked by traits held in common.
同种,同类：因具有共同的特性而联系在一起的个体的集合
A particular variety; a sort:
特定的种类；类别：
What kind of soap do you like best?See Synonyms at type
你最喜欢哪一种肥皂?参见 type
sort n.种类,类别
type n.（名词）
A number of people or things having in common traits or characteristics that distinguish them as a group or class.
类型：一定数量的人或事物,具有把他们与一个集体或种类区分开的共同特征或特点
The general character or structure held in common by a number of people or things considered as a group or class.
标志,特质：作为一个集体或种类的人或事物共同拥有的总体特征或结构
A person or thing having the features of a group or class.
典型：拥有一个集体或种类特征的人或事物
variety n.
The quality or condition of being various or varied; diversity.
多样化：多种多样或变化多端的性质或状况；多样性
A number or collection of varied things,especially of a particular group; an assortment:
（多种东西的）组和：许多不同东西或不同东西的集合,尤其是一个特殊群体的；一套物品：
brought home a variety of snacks.
带回家许多种零食
A group that is distinguished from other groups by a specific characteristic or set of characteristics.
种类：由于一种具体的特性或一组特性而区别于其它种群的一群