三鍵

三键
sānjiàn
  1. triple bond (chemistry)
  2. triple link

CEDICT

chemistry

Entry Composition

1 三 sān
  1. three
  2. 3
2 鍵 jiàn
  1. key (on a piano or computer keyboard)
  2. button (on a mouse or other device)
  3. chemical bond
  4. linchpin