The group discussed the state of current knowledge about PRRS vaccinations at the invitation of the University Of IllinoisCollege Of Veterinary medicine.
应美国伊利诺斯州立大学兽医学院的邀请，该专家组对当前PRRS免疫防治的知识现状进行了讨论。
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"This is the oldest example of saws being used for cutting stone," said Bown's colleague James Hoffmeier of Wheaton College in Illinois.
鲍恩的同事、伊利诺斯州惠顿学院的詹姆斯·霍弗梅尔说：“这是用锯子来切割石头最古老的例子。”
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"This is the oldest example of saws being used for cutting stone," said Bown's colleague James Hoffineier of Wheaton College in Illinois.