使用$（this）而不是全局类，这显然会影响所有项目与该类。

Use $(this) instead of global class, which will obviously affect all items with that class. By using THIS you are targeting specific item that was hovered.

  $(".hot_post_thumbnail").mouseover(function(){
     $(this).parent().siblings(".hot_post_title").css("display","block");
  });

  $(".hot_post_thumbnail").mouseout(function(){
     $(this).parent().siblings(".hot_post_title").css("display","none");
  });

复制粘贴应该可以做到。

Copy pasting this should do the trick.

要设置延迟效果，请使用show（）。

To set delay effect use show() instead.

  $(".hot_post_thumbnail").mouseover(function(){
     $(this).parent().siblings(".hot_post_title").show("100");
  });

  $(".hot_post_thumbnail").mouseout(function(){
     $(this).parent().siblings(".hot_post_title").hide("100");
  });

当您想立即设置css设置时使用css。

Use css when you want to set css settings instantly.