2019-01-14 viable

1. economically/financially/commercially viable

    perfectly/truly/extremely viable

    consider/regard sth viable

    remain sth viable/ make sth viable

    prove/sound/seem

2. 中国经济下行，许多O2O模式显得不再可行。

China is experiencing an economic downturn. In this regard, a decent number of O2O mode seem nonviable.

As China's economy is going downhill, many online-to-offline(O2O) business no longer seem ( commercially/economically) viable.

3. 虽然到目的语国家生活是学习外语的一个好方法，但从经济角度上说，却不一定是一个可行的方法。

 Living in the country of  your target-language is a good way of learning foreign language, but not an economically viable one.