Resume generally doesn't need complete sentences, just like your Chinese resume, but when translated into English, it becomes complete in subject, predicate and object, which is the most need to be corrected.

Two years of research and development experience

Design plastic and sheet metal, review and inspect molds.

Skillfully use 3D /2D tools for design, such as Pro/E, AutoCAD, etc.

Good English communication skills.

Complete 6sigma green belt training

If not specified, please avoid using. Try to use the plural.