1. feel/be at ease with sb 与…在一起舒适而无忧虑; with ease/without difficulty
2. a very enjoyable and exciting experience一次愉快和兴奋的经历
have much experience in doing sth 有许多做某事的经验
be experienced in/at (doing) sth 做某事很有经验
3. be happy with sb/sth 对…感到满意
4. mean doing sth 意味着做某事 mean to do sth 打算做 by this means 用这方法
