Drain; Backwater; Floor drain; Outdoor measure.

给排水；回水；地漏；户外计量。

youdao

It is difficult to measure ETS removal rates in outdoor Settings since outdoor conditions are highly variable and change rapidly. (Page III-13).

由于户外情况高度变化，并且变得很快，在户外环境测量环境烟害的去除率是困难的。

youdao

Kinomap apps enable users to view a pre-recorded, geo-located outdoor route, measure their own performance and view progress on an accompanying map.

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In their outdoor laboratory, they set out to measure how much atmospheric carbon the crops were able to lock in the soil.

BBC: Measuring bioenergy crops' carbon footprint credentials