表达式7: polygon left parenthesis, left parenthesis, "c" Subscript, "x" 1 , Baseline , "c" Subscript, "y" 1 , Baseline , right parenthesis , left parenthesis, "c" Subscript, "x" 1 , Baseline plus cos left parenthesis, "t" , right parenthesis times "w" , "c" Subscript, "y" 1 , Baseline minus sin left parenthesis, "t" , right parenthesis times "w" , right parenthesis , right parenthesispolygoncx1,cy1,cx1+cost·w,cy1−sint·w
7
表达式8: polygon left parenthesis, left parenthesis, "c" Subscript, "x" 2 , Baseline , "c" Subscript, "y" 2 , Baseline , right parenthesis , left parenthesis, "c" Subscript, "x" 2 , Baseline plus cos left parenthesis, "t" , right parenthesis times "w" , "c" Subscript, "y" 2 , Baseline minus sin left parenthesis, "t" , right parenthesis times "w" , right parenthesis , right parenthesispolygoncx2,cy2,cx2+cost·w,cy2−sint·w
8
表达式9: polygon left parenthesis, left parenthesis, "c" Subscript, "x" 1 , Baseline , "c" Subscript, "y" 1 , Baseline , right parenthesis , left parenthesis, "c" Subscript, "x" 2 , Baseline , "c" Subscript, "y" 2 , Baseline , right parenthesis , left parenthesis, "c" Subscript, "x" 2 , Baseline minus 0.5 "h" , "c" Subscript, "y" 2 , Baseline plus "h" , right parenthesis , left parenthesis, "c" Subscript, "x" 1 , Baseline minus 0.5 "h" , "c" Subscript, "y" 1 , Baseline plus "h" , right parenthesis , right parenthesispolygoncx1,cy1,cx2,cy2,cx2−0.5h,cy2+h,cx1−0.5h,cy1+h
9
表达式10: "c" Subscript, "x" 1 , Baseline equals "t"cx1=t
