trireme
/ˈtraɪriːm/noun
- an ancient Greek or Roman war galley with three banks of oars. The rowers are believed to have sat in threes on angled benches, rather than in three superimposed banks三层桨船, 三列桨船（古希腊和古罗马战船）。
词源
from Latin triremis, from tri- 'three' + remus 'oar'.