I don't have much contact with my uncle.

　　我和叔父甚少聯系。

　　He was unable to contact Blake by radio.

　　他未能通過無線電和布萊克取得聯系。

　　Can you suggest how I might contact him?

　　我怎么才能聯系上他，你能出個主意嗎？

　　I've been trying to contact you all day.

　　我整天一直在設法與你聯系。

　　How did you make contact with the author?

　　你怎么跟這位作者聯系的？