"克拉森"是个多义词，它可以指克拉森（荷兰足球运动员戴维·克拉森）,克拉森（比利时足球运动员）,克拉森（科特赖克队球员）,尼古拉斯·克拉森。
克拉森医生正在法兰克福完成他的最后一项工作。
Dr. Classen is just now completing his last business in Frankfurt.
“这是长距离飞行的不解之谜之一，”克拉森说。
"This is one of the unsolved mysteries of long-distance flights," Klaassen said.
克拉森说，用药差错最常见，其次是手术和非手术治疗程序的差错，第三是院内感染。
Medication errors were most common, followed by errors in surgical and nonsurgical procedures and in common infections, Classen said.
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