Cold water immersion has been linked to increased tolerance to stress, a stronger immune system, increased fat burning, and anti-depressant effects.

冲冷水能增加你对压力的耐受性，增强免疫能力，增加脂肪消耗并有抗抑郁的效果。

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It said its safety tests showed that plane engines had "increased tolerance levels in low ash density areas".

BBC: Ash flights ban: UK airports permitted to reopen

Gupta said four of the babies will begin feedings Tuesday, and feedings will be increased once the newborns' tolerance improves.

CNN: Octuplets doing 'very well' one day after birth

The Welsh and Cardiff city governments try to address these problems with more urban regeneration - and sometimes with increased monitoring of immigrant areas and programmes to foster tolerance among Welsh people.

BBC: Wales' race tension and tolerance