介於

介于
jièyú
  1. between
  2. intermediate
  3. to lie between

CEDICT

Entry Composition

1 介 jiè
  1. to introduce
  2. to lie between
  3. between
  4. shell
  5. armor
2 於 yú
  1. (of time or place) in; at; on
  2. (indicating any indirect relation) to; toward; vis-à-vis; with regard to; for
  3. (indicating a source) from; out of
  4. (used in comparison) than
  5. (used in the passive voice) by