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。

youdao

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。

youdao

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.

现在全球约有2600万个集装箱，它们装运的货物量已从1980年的1350万个“廿呎货柜等量单位”增加到今日的近14000万个。

youdao

Although high-volume units treated the sickest infants and had highest crude death rates, when the statistics were adjusted for factors such as the severity of the illness, patient volume and staffing provision, unit size did not influence death or brain damage rates.

BBC: 'Baby death risk' of busy units

The -19% decline from previous year left the global volume at 264 million units.

FORBES: Feature Phone Drama for Nokia in 2013

This is obviously less than what Microsoft planning with the Surface RT, which had an initial shipment volume of four million units.

FORBES: Links 10 Feb: Microsoft's Surface Pro Sells Out: But How Many Did They Release?