本期內容：

Arnold Schwarzenegger has undergone heart surgery in Los Angeles. The Austrian-American film star and former California governor, 70, had a scheduled procedure to replace a valve at Cedars-Sinai hospital on Thursday. The device was installed to repair a defective aortic valve in 1997. Thursday's operation lasted several hours. Schwarzenegger is said to be recovering well and reportedly commented after waking from surgery: "I'm back.”

undergo: 經歷
scheduled：既定的
valve：瓣膜
defective：有缺陷的
aortic：主動脈

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