乘chéng
to ride, to mount, to make use of倍bèi
(two, three etc) -fold升shēng
to raise, to hoist, to promote单位dān wèi
a unit, unit (of measure)尺子chǐ zi
rule, ruler (measuring instrument)平方píng fāng
"square (as in square foot, square mile, square root)"总共zǒng gòng
altogether, in sum, in all, in total