talk a lot about means but almost nothing about ends 意味

• 手段｛しゅだん｝について多くを語るが目的｛もくてき｝についてはほとんど何も語らない
  

• know almost nothing about:    ～についてほとんど何も知らない
• to talk about nothing but:    to talk about nothing but持ち切るもちきる
• have nothing in common to talk about:    共通の話題がない