- But because hard laughter is difficult to sustain, a good laugh is unlikely to have measurable benefits the way, say, walking or jogging does.
2011年考研真題（英語(yǔ)一）完形填空 Section Ⅰ
- In fact, instead of straining muscles to build them, as exercise does, laughter apparently accomplishes the opposite.
2011年考研真題（英語(yǔ)一）完形填空 Section Ⅰ
- Laughter does produce short-term changes in the function of the heart and its blood vessels, boosting heart rate and oxygen consumption.
2011年考研真題（英語(yǔ)一）完形填空 Section Ⅰ
- similarly, the physical act of laughter could improve mood.
2011年考研真題（英語(yǔ)一）完形填空 Section Ⅰ
- Studies dating back to the 1930's indicate that laughter relaxes muscles, decreasing muscle tone for up to 45 minutes after the laugh dies down.
2011年考研真題（英語(yǔ)一）完形填空 Section Ⅰ
- The room burst into laughter; the man looked puzzled and hurt.
2010年考研真題（英語(yǔ)二）閱讀理解 Section Ⅱ