1. painful a.(引起)疼痛的;困难的,令人不快的
Teaching him Greek was a painful process.
教他希腊文是很吃力的事。
2. relax v.放松,使 ... 放松,使 ... 缓和
The music will help to relax you.
音乐会使你感到轻松。
3. breakup 分手
He seemed to have a rather clinical view of the breakup of his marriage.
他似乎是相当冷静地看待自己的婚姻破裂。
4. reference n.提到;查阅;参考书目;推荐信(或人)
This book is for reference only.
这本书仅供参考。