A good, satisfying job can be the product of years of education.
一个理想而令人满意的工作,是在接受几年的教育之下才能获得的。
The operation, which lasted for over four hours, proved to be very difficult because of the hard resin which covered the skin.
手术持续了4个多小时,非常难做,因为皮肤上覆盖着一层硬硬的树脂。