1、You wouldn't have had the CAT scan that found the cancer before it spread.
你就不會做CAT掃描，發(fā)現(xiàn)癌細胞，就不能防止他擴散。

2、About 30 major medical centers in the United States have xenon CAT scan technology.
美國大約有30家主要醫(yī)療中心有氙氣CAT掃描儀技術。

3、But the following March, a CAT scan revealed the cancer had returned.
但第二年的三月，一次CAT掃描發(fā)現(xiàn)癌癥復發(fā)了。