海底扩张

海底擴張
hǎidǐkuòzhāng
seafloor spreading (geology)

CEDICT

geology

Entry Composition

1 海底 hǎidǐ seabed; seafloor; bottom of the ocean
2 扩张 kuòzhāng
  1. expansion
  2. dilation
  3. to expand (e.g. one's power or influence)
  4. to broaden