1. 释义： able to be done, or worth doing 

2. 例句： 

星巴克在四线城市开店半年收入好于预期，证明这在商业上是可行的。

Starbucks' new store in this fourth-tier city has proved commercially viable. 

To keep its design pipeline full of viable new ideas, the firm must constantly forecast the computer industry’s direction. 

为了使设计充满可行的新想法，公司必须持续预测电脑行业的新方向。

3. 造句：

中国经济下行，许多 O2O 模式显得不再可行。 

As the China's economy is declining, many O2O business modes no longer seem commercially viable. 

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

为了使公司继续运营下去，不得不裁员。

In order to make the company viable, it wil be necessary to lay off workers.