青少年

teenager; teen; adolescent; junior; [law]young person; juvenile; teenage; young

肥胖

fat; heavy; puffy; overweight; corpulent; plump; stout; portly; rotund; pudgy; obesity; corpulence; fatness; adiposity; polysarcia

原因

reason; cause; source; rationale; basis; occasion; motive; motivation; sense; meaning; anatomy; recipe; explanation; causation; causal