1 文書を見つけるための辞書。

• train, string
• 数珠つなぎ
• a sequentially ordered set of things or events or ideas in which each successive member is related to the preceding; "a string of islands"; "train of mourners"; "a train of thought"
• 物や出来事や考えを順番に並べた集まりで、後に続く要素はいずれもその前の要素と関連している