| 释义 | Seelight sourceSeealternative wayWhether or not fish could provide a viable alternative protein source, it is clear that one will be needed, given the likely scenario of exponential population growth.Yet recycling food waste could provide an alternative source of low-carbon energy.FirstGroup has yet to decide how many of the buses will be powered by alternative fuel sources.Example sentencesalternative sourceCOBUILD Collocationsalternative source alternative source  anonymous source  constant source  important source  light source  main source  primary source  sustainable source  unexpected source  unlikely source |