例句與造句

1. First , the question answering system calculates semantic similarity by using distance between words in semantic tree and the height of semantic tree , then this system uses semantic similarity between words and the weight of word to calculate semantic similarity between users ' questions and questions in answer database
   首先，利用語義樹中詞語間的距離和語義樹的高度來計算詞語間的語義相似度，然后利用詞語間的語義相似度和詞語的權重進一步計算用戶問題與答案庫中問題間的語義相似度。
2. It's difficult to find semantic tree in a sentence. 用semantic tree造句挺難的