Hafni
鉿(金屬原素)
??? 情景例句
Too many people take drugs to get high.
好多人吸毒是為了得到一種快感。
He gets more professional satisfaction from teaching.
從事教育職業，他更感受到職業上的滿足。
therefore the jungles and the savannahs know of no'juvenile delinquency'.
因此，叢林和荒涼地區不知道什么叫青少年犯罪"。