- Only stuck four principles does "Double Lessons" teaching can achieve twice the result with half the effort, and make students show their gratifying progress and lovely personality.
- He is working double tides to finish his essay.
- I do not realize it is a double feature.
- Double agents live in a perpetual state of fear.
- I want a double room with a view.
- He was so fat that he had a double chin.
double fan double double- reverse flotation process double barreled forced coring tools double antibody radioimmuno-assay double-bridge differential wiring double-winding AC-DC generators double-base two-phase structure double-breasted shark-skin suit Double-null Asymptotic Additivity double-shared double wheeled plow double chamber sand blast apparatus