Nocera and his team identified a set of inexpensive, common catalysts including nickel and cobalt that get the job done with far less expense.
诺赛尔和他的团队选择了一些低廉且常见的催化酶，如镍、钴等，这让他们花费很低的代价就完成了类似的工作。
He fears that "once again California would be the great experiment for the rest of the world at the expense of public safety, community health and common sense."
他担心加州又要成为“小白鼠”，而代价则是公共安全与卫生以及道德底线。
In societies where four or six children were common, a boy would almost certainly come along eventually; son preference did not need to exist at the expense of daughters.
在一个家家基本上都有四至六个孩子的社会，一个家庭几乎肯定会有一个男孩；想要儿子不必以牺牲女儿为代价。
It is all too common for systems to be built based on assumptions regarding availability, leading inevitably either to inappropriate expense, or applications that perform worse than desired.
很普遍的做法是系统构建在假定的可用性上面，这不可避免地导致不合适的花费或应用程序工作得比预期的要差。
Believe in bettering conditions for the common good even at their own expense. They are committed to improving the quality of life through collaborative efforts.
认为应该创造更好条件来追求共同利益，即使是他们付上代价。他们致力于通过共同努力，改善生活质量。
Believe in bettering conditions for the common good even at their own expense. They are committed to improving the quality of life through collaborative efforts.
认为应该创造更好条件来追求共同利益，即使是他们付上代价。他们致力于通过共同努力，改善生活质量。
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