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