现象: appearance (of things); phenomenon 短语和例子自然现象 natural phenomenon; 社会现象 social phenomenon; 向不良现象作斗争 combat unhealthy phenomena; 暂时现象 transient phenomenon; 日[月]食是一个有趣的现象。 an eclipse is an int
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
