例句與造句

1. The unit of mass is the kilogram which is defined as the mass of the international prototype kilogram maintained at the international bureau of weights and measures ( bipm ) in france
   質(zhì)量質(zhì)量的單位是千克，其定義為在法國的國際計量局( internationalbureauofweightsandmeasures )所持的國際公斤原器( internationalprototypekilogram )的質(zhì)量。
2. It's difficult to find prototype kilogram in a sentence. 用prototype kilogram造句挺難的