Doubtisthekeyofknowledge.怀疑乃知识的钥匙。......
Knowledgeisatreasure,butpracticeisthekeytoit.知识是一座宝库,实践是打开宝库的钥匙。......
Idlenessisthekeyofbeggary,andtherootofallevil.懒惰是行乞的敲门砖,是万恶的根源。......