•In order to make the company viable, it will unfortunately be necessary to reduce staffing levels.很遗憾，为使公司继续运转下去，将不得不裁员。

•I am afraid your plan is not commercially/economically/financially/politically viable.恐怕你的计划在商业／经济／财政／政治上行不通。

•There is a continuing debate about the age at which a human fetus can be considered viable.关于人类胎儿在何时可被视为已有生命的问题仍处于争论中。