缺一不可

quēyī-bùkě
idiom #47,241

Meanings

  1. 1 cannot do without a single one
  2. 2 every element is indispensable
  3. 3 all are required; none can be missing

Examples

Zhè sān gè tiáojiàn quēyī-bùkě.
None of these three conditions can be missing.
Dé zhì tǐ quánmiàn fāzhǎn, quēyī-bùkě.
Moral, intellectual, and physical development - not one can be left out.
Pèiliào hé huǒhou, quēyī-bùkě.
Ingredients and heat control - neither can be skipped.

Tips

grammar
Usually sentence-final, summing up a list that came before: '(X, Y, Z), 缺一不可.' Not used in isolation; always refers back to a set of listed items.
history
From 《水浒传》 ch. 20: Lin Chong insists the strategist must join the council with 鼎分三足,缺一不可 - 'like a tripod with three legs, not one can be missing.' The tripod image is exactly right: take away any leg and the whole thing falls.

Stroke Order

quē