The tipping point for so many people is the more constant concern of putting food on the table and providing for a family.

VOA: special.2011.05.21

And when we make these comparisons, one thing I want to point out is that we need to keep the constant principle quantum number constant, so we're talking about a certain state, so we could talk about the n equals 2 state, or the n equals 3 state.

当我们做这些比较时，我想指出的一件事是,我们需要保持常量原则,保持量子数是常数，所以我们在讨论一个确定的态时，我们可以谈论n等于2的态，或者n等于3的态。

麻省理工公开课 - 化学原理课程节选

" Correct answer: "The balance sheet of Ford Motor Credit has deteriorated to the point where it is at constant risk of being pushed out of the commercial paper market.

FORBES: Trust Me

People in an at work state of mind today are exposed to a constant, multi-point flow of communications from not just customers, suppliers and co-workers, but also from family, friends, would-be friends and network members.

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Despite falling behind so early, Shakhtar gave a good account of themselves in the opening stages, with Willian's pace down the left testing Alves and Luiz Adriano posing a constant problem as the focal point of the visitors' attacks.

BBC: Barcelona 5-1 Shakhtar Donetsk