You need to become fully conversant with the company's procedures.你得对公司的程序了如指掌。Those in business are not, on the whole, conversant with basic scientific principles.总的来说，那些从商的人并不太熟悉基本的科学原理。be conversant with medieval...
从出生到一岁的孩子心理学上称为乳儿期.From birth to age child psychology is called Suckling period.只有乳儿入睡的时候,她才能撰著.She can write only when the baby is asleep.照料乳儿需要极大的耐心.Take care of suckling require a great deal of patience....