在双气旋技术和流线型外观设计完善前，詹姆斯爵士已做出5127个吸尘器样品。
Sir James made 5,127 prototypes before the dual-cyclone technology and sleek design was perfected.
应用非对称理论研究了双热带气旋的相互作用。
The interaction of binary tropical cyclones is investigated applying the asymmetric theory.
应用非对称理论研究了双热带气旋的相互作用。
The interaction of binary tropical cyclones is investigated applying the asymmetric theory.
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