A litre of teacan contain up to 9mg of fluoride, which in excess can cause skeletal fluorosis, reducing bone quality and causing pain and stiffening of the ligaments.

一升茶树含有高达9毫克的氟化物，过量会导致氟骨症，降低骨骼质量，导致疼痛和韧带僵硬。

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The objective is to observe the effect of life quality, pain, morning stiffness, tumidity and other clinical symptoms.

目的是观察生活质量、疼痛、晨僵、四肢僵硬和其他临床症状的影响。

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Consequently, you and your team have begun to question the value of unit tests: if they are so important to code quality, why are they such a pain?

因而，您和您的团队开始质疑单元测试的价值：如果它们对代码质量那么重要，那又为什么会让人这么头痛呢？

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In a fighting dog, the quality that is prized above all others is the willingness to persevere, even in the face of injury and pain.

NEWYORKER: Offensive Play

Patients may decide they would rather leave the half million dollars to their families than spend it on heroic medicine, which may entail a lot of physical pain and suffering, with highly compromised quality of life on the other end at best.

FORBES: The Two Alternatives For Health Care Policy

The net result will be fewer disease-curing or -preventing, pain-reducing, quality-of-life-enhancing medical breakthroughs.

FORBES: Fact and Comment