一般来说，在正式写作中，你不会使用像这样的斜杠，而应该用单词or。例:It would be nice to think this tip–off enabled him to avoid this fate but I fear his life was lost along with those missing hyphens.’。
At that time there were two important things which were worth mentioning: one was the practical knowledge of the Egyptian workers in metals， pottery and dyes;
