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单语范例（未经PONS编辑处理）
Creep tests are performed to ensure that the nail design loads can be safely carried throughout the structure's service life.
en.wikipedia.org This is an easy way to ensure tissue or time specific expression of a gene where it is not usually expressed.
en.wikipedia.org The tread provides traction while the body ensures support.
en.wikipedia.org Most districts identified the superintendent and school foodservice director as responsible for ensuring local wellness policy implementation.
en.wikipedia.org Working professionals teach all the offered workshops, and class sizes are kept small to ensure individualized attention.
en.wikipedia.org