1. It is only their investment that makes the programme economically viable.
   因为他们的投资，这个项目在经济上才得以通过。
2. Engineers are still trying to come up with a commercially viable replacement for internal-combustion engines.
   工程师在设法制造一种在商业上切实可行的发动机来取代内燃机。
3. The scheme is economically viable.
   这个计划从经济效益来看是可行的。
4. Passive and Hybrid Downdraught Cooling, which rely on natural cooling processes based on water evaporation and solar power, are now technically viable in many parts of the world.
   依靠水蒸发和太阳能的被动及混合倒风制冷技术目前在世界上大部分地方得到了广泛应用。
5. From the visual prognosis of our series, transscleral fixation of posterior chamber lens appears to be a viable alternative to improve functional visual acuity in acapsular aphakic patients.
   由本篇病患视力预后结果，显示经巩膜固定后房人工水晶体术，对缺乏后囊袋支撑之无水晶症病患的功能性视力改善，是一项极佳之选择。

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