When the species lived, South America was not in contact with other continents.

该物种出现时，当时的南美并未与任何大陆相连。

You promised me you weren't in contact with Ben.

你向我保证过 不再跟本联系。

Brazil is home to several native groups that are not in contact with other peoples.

巴西是几个不与其他民族接触的土著群体的家园。