The gemstone is 28.6 millimetres high and weighs 139.43 carats.这块宝石高28.6毫米，重139.43克拉。The edge must be machined down to 0.02 millimetres.这边缘必须切割到0.02毫米的精确度.One centimetre is equal to 10 millimetres.一厘米等于10毫米....
When automobiles become popular, the use of the horse and buggy passed away.汽车普及后, 就不再使用马和马车了.Automobiles speed in an endless stream along the boulevard.宽阔的林荫道上,汽车川流不息.The factory was built for the production of automobi...