现在教给孩子的学科都过于深奥.The child is being taught subjects that are beyond his depth.他们的辩论太深奥,我搞不懂.Their argument was too metaphysical for me to follow.这是一本深奥的书.This is a deep book....
The contract that was signed on Thursday morning was backdated to March 11.周四早上签订的合同实际生效日期追溯到3月11日。The pay in crease is backdated to January 1 st.增加的工资将从1月1日算起.Worse, the changes have been backdated to the start of this ...