二流: second class; second-rate体: body; part of the body理论: theory磁流体理论: hydromagnetic theory单流体理论: one fluid theory多流体理论: poly-fluid theory两流体理论: two-fluid theory流体理论: channel theory双流体理论: two-fluid theory理想流体理论: ideal fluid theory; perfect fluid theory; perfect-fluid theory八隅体理论: octet theory半导体理论: semiconductive theory本体理论: ontology theory扁体理论: raft theory单载体理论: single-carrier theory多体理论: many-body theory浮体理论: theory of floating bodies固体理论: theory of solids; theory solid核少体理论: nuclear few body theory聚合体理论: polymer theory壳体理论: shell theory气体理论: gas theory群体理论: groutheory三联体理论: triplet hypothesis; triplet theory双层体理论: two-layer theory
