That results from the sustained contraction of the facial muscles.

由于面部肌肉的持续收缩。

youdao

They result from sustained contraction of face and neck muscles, often due to fatigue, stress, or frustration.

肇因于面部和颈部肌肉的持续紧缩，通常是因过度劳累、压力和挫折而产生。

youdao

For the moment, in any case, a sustained contraction of bank lending is still a threat, not a fact.

ECONOMIST: A new approach to financial risk

It has -- it did lead to the cessation of economic contraction and a sustained period now of economic growth, albeit too slow.

WHITEHOUSE: Press Briefing