more rarely [mɔr ˈrɛrli]

例句:

• More rarely, the tubes have been malformed from birth.
  这些管状器官先天畸形的现象更加少见。
  
• More rarely such larvae , which fail to reenter the circulation, are found in other abdominal organs.
  更罕见的是,蛔蚴不能再进入循环而进入腹部其它器官.
  
• Viruses also, though more rarely, swap DNA with animals.
  病毒同时也会跟动物交换DNA, 尽管几率少得多.
  
• Their music, however, is rarely more than functional.
  来自BBC
• He rarely spent more than a dollar for a book.
  来自NEWYORKER
• Disturbed winter weather rarely lasts more than a few days.
  来自BBC