The conventional method involves boiling and then distilling water. An alternative works by reverse osmosis, in which water is forced through a semi-permeablemembrane.
传统技术用的是蒸馏，新兴的替代技术是通过迫使咸水通过一个反渗透薄膜以达到过滤。
2
Here's your semi-permeablemembrane.
这是你的半透膜。
3
This involves tapping both freshwater and seawater at the mouths of Norway’s many rivers and fjords, and diverting it to tanks on either side of a semi-permeablemembrane.