【重点词汇】
1.acknowledgement n. 承认，确认，感谢
如：Her theory was quoted without an acknowledgement.
她的理论被人引用而未向她致谢。
We are sending you some money in acknowledgement of your valuable help.
我们送些酬劳，对您的大力协助聊表谢意。
2.Eye contact 眼神交流
如：Eye contact is important when you are talking with others.
和别人说话的时候，眼神交流很重要。
3.wallow in 沉迷，沉溺
如：He seemed to be wallowing in luxury.
他似乎沉溺于豪华的享乐中。
The children enjoyed watching the hippopotamus wallowing in the mud.
孩子们喜欢看河马在泥中打滚。
4.all of the time 随时