海底扩张说 hǎi dǐ kuò zhāng shuō

DEFINITIONS

  1. theory of seafloor spreading (geology)

CHARACTERS

海 hǎi
HSK 4
sea, ocean; maritime
底 dǐ
HSK 4
bottom, underneath, underside
扩 kuò
HSK 5
expand, enlarge, stretch
张 zhāng
HSK 3
stretch, extend, expand; sheet
说 shuō
HSK 1
speak, say, talk; scold, upbraid