The scientists contend that in industrialized countries with modern medical care and sanitation, maintaining a reserve of helpful bacteria has become unnecessary.

专家们强调说因为工业化国家有先进的医疗条件和卫生设备，所以生活在那里的人阑尾内继续储备有益细菌已经变得无关紧要。

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The contract changes are also designed to introduce new measures for improving care for patients with long-term chronic conditions and prevent unnecessary emergency admissions to hospital.

BBC: GP contract talks breakdown over 1.5% funding offer