four force-cycle四点力封闭
four-storke cycle四冲程循环
four-cycle engine四行程引擎;冲程发念头;四冲程发动机;四行程发动机
Four-Stroke Cycle四支点悬挂
four-cycle graph四圈图
Four-year cycle四年轮回
four-phase cycle四相循环
four-cycle period四冲程循环周期
four-stroke-cycle四冲程循环
four-stroke cycle engine四冲程发动机;气
ADJ（形容词） relating to or designating an internal-combustion engine in which the piston makes four strokes for every explosion 四冲程循环的 (Equivalent term (in Britain and certain other countries) four-stroke) [美国英语] → compare two-stroke