常: Ⅰ形容词1.(一般; 普通; 平常) ordinary; common; normal 短语和例子反常 unusual; abnormal; 人情之常 natural and normal; 习以为常 be used [accustomed] to sth.2.(不变的; 经常) constant; invariable 短语和例子冬夏常青 remain green thr
镇: Ⅰ名词1.(镇守的地方) garrison post 短语和例子军事重镇 strategic post2.(行政区划单位) town 短语和例子小镇 townlet; 镇民 townsfolk; townsman; 乡镇 villages and towns3.(较大的市集) trading centre 短语和例子集镇 market town4.(姓氏) a surnam