viable

太阳能是煤炭能源的一个可行替代方案。

Solar energy is a ___viable alternative to coal power.

一个项目要成功，需要在财务上可行。

For a project to succeed, it needs to be financially ___viable.

太阳能被认为是核能的一个可行替代方案。

Solar energy is considered a ___viable alternative to nuclear power.