semisubmersible platform
/sˌaɪzməɡɹˈafɪk ɹɪkˈɔːdɪŋ/
n
中文：半潜式平台
Meaning：Movable structure that is anchored to the seabed and used at depths of 100 to 500 m; it is mounted on pontoons submerged at about 30 m to provide stability. production platform