1. 一连串相关联的事情；接二连三的相关事件
A concatenation of things or events is their occurrence one after another, because they are linked.

1. the act of linking together as in a series or chain

2. a series of things depending on each other as if linked together

e.g. the chain of command
a complicated concatenation of circumstances

Synonym: chain

3. the linking together of a consecutive series of symbols or events or ideas etc

e.g. it was caused by an improbable concatenation of circumstances

4. the state of being linked together as in a chain
union in a linked series