A man collected tolls at the gateway.一个人在大门口收通行费。The long - distance call tolls amount to quite a sum.长途电话费 数目相当可观.For Whom the Bell Tolls is vintage Hemingway.[战地钟声]是海明威的杰作.For whom the bell tolls.丧钟为谁而鸣?...
The long - distance call tolls amount to quite a sum.长途电话费 数目相当可观.For whom the bell tolls.丧钟为谁而鸣?For Whom the Bell Tolls is vintage Hemingway.[战地钟声]是海明威的杰作....
质量流量的数据可借助于密度计而获得.Mass flow information can be secured by using a densitometer.定义密度计内设有样品时的密度为密度尺标的零点.The zero point of the density scale is defined by having no specimen in the densitometer.光学密度计是一种测量胶片感光性能的专用仪器.Densito...