所以通过一个朋友互相认识了的英文

so we got to know each other through a friend

• 所以:    so; therefore; as ...
• 通过:    pass through; get ...
• 一个朋友:    a friend; "一个国家,两种 ...
• 互相:    mutual; each other
• 认识:    be familiar with; ...
• 了:    finish; complete; ...