Care must be taken to unite with all the people that can be united with.

必须注意团结一切可以团结的人。

Care must be taken to unite with all those that can be united with.

必须注意团结一切可以团结的人。

Oil will not unite with water.

油与水混合不起来。

Unite with all the forces that can be united.

团结一切可以团结的力量。

We must unite with all those who can be united.

我们必须团结一切可以团结的人。