invaluable

极有用的，极宝贵的adj.

• I was able to gain invaluable experience over that year.

  在那一年里我获得了十分宝贵的经验。

• Traffic control systems and methods of construction developed under the interstate program soon influenced highway construction around the world, and were invaluable in improving the condition of urban streets and traffic patterns.

  交通控制系统和建设方法在州际公路项目下发展起来，很快就影响了世界各地的公路建设，在改善城市街道状况和交通模式方面发挥了宝贵的作用。

• A more conclusive answer about life on Mars, past or present, would give researchers invaluable data about the range of conditions under which a planet can generate the complex chemistry that leads to life.

  火星上过去和现在是否存在生命这一问题如果有更加确凿的答案，研究人员将获得一些珍贵的数据——即行星在什么条件下能够发生最终产生生命的复杂化学反应。