从1996年开始，随着这些国家在制造业出口市场上面临来自中国和墨西哥越来越强的竞争，危险信号变得清晰可见。

(1)One "bad apple" can spread negative behavior like a virus to bring down officemates or destroy a good team.
(2)Supercomputers have computed pi to more than a trillion decimal places, looking always for a pattern to unlock its mystery.
(3)Infants and apes apparently adopt the same tactics for remembering where things are, but as children develop their strategies change.
(4)Warning signs became apparent from 1996, as these countries faced increased competition from China and Mexico in markets for manufacturing exports.
(5)Just 10 percent of the 30 million Chinese currently suffering from depression are getting proper medical care due to a lack of psychiatrists and social prejudice against mental illness.