一大截

yīdàjié

a large section; significant difference (in comparisons)

Wiktionary

Entry Composition

1 一 yī
  1. one
  2. single
  3. a (article)
  4. as soon as
  5. entire; whole; all; throughout
  6. "one" radical in Chinese characters (Kangxi radical 1)
  7. also pr. yāo for greater clarity when spelling out numbers digit by digit
=2 大 dà
  1. big; large; great
  2. older (than another person)
  3. eldest (as in 大姐 dàjiě)
  4. greatly; freely; fully
  5. (dialect) father
  6. (dialect) uncle (father's brother)
=2 大 dài see 大夫 dàifu
3 截 jié
  1. to cut off (a length)
  2. to stop
  3. to intercept
  4. section
  5. chunk
  6. length