These units boil down to number, weight, or volume.
这些单位都归结为数字，重量或者体积。
2
The company said results were boosted by higher shipping volume, particularly at its international express and Ground units.
该公司表示，业绩增长来自于高运输量，尤其是其在国际快递和地面运输业务。
3
There are currently about 26m containers in the world, and the volume of goods they carry has risen from 13.5m "twenty-foot equivalent units" in 1980 to almost 140m today.