string

Compared meaning: a series of connected things or events (noun).

比较义项：一连串，一系列（同类事物或相关事件）（名词）。

• train

  Train suggests a logically connected chain in which each event follows from or leads to the next; it sounds more formal and literary, and typically collocates with 'thought', 'events', or 'consequences'.

  train强调一连串前后有逻辑关联的事件，一件引出下一件；语气较正式、书面化，常与“thought”“events”“consequences”等词搭配。

  The phone ringing interrupted her train of thought while she was writing.

  电话铃声打断了她写东西时的思路。

• string 本词

  String describes a series of similar or repeated items lined up one after another, often noting a negative or striking pattern; it sounds more casual and does not imply cause and effect.

  string指依次排列的一连串同类或重复出现的事物，常用来指出负面或引人注意的情况；语气较口语化，也不含因果关系的意味。

  The team has suffered a string of defeats since the coach left.

  自从教练离开后，这支球队遭遇了一连串的失利。

Train and string both mean a series of things. Train suggests events logically linked, one leading to the next, and sounds formal. String suggests similar things repeated in a row, sounds casual, and often feels negative. It does not cover train (railway) or string (rope).

这两个词在“一连串、一系列”这个意义上很接近，但train强调事件之间前后相连、有因果或逻辑关系，语气较正式书面；string强调同类或重复事物依次排列成的一串，语气较口语，也常带负面意味。这里不比较train表示“火车”的意思，也不比较string表示“绳子、细线”的意思。