例句與造句

1. Tube amplifiers typically have much lower feedback ratios, and in any case almost always have output transformers that limit how low the output impedance can be.
2. Front-page rank  for both the general front page and for individual subreddits  is determined by the age of the submission, positive ( " upvoted " ) to negative ( " downvoted " ) feedback ratio and the total vote-count.
3. It's difficult to find feedback ratio in a sentence. 用feedback ratio造句挺難的