A person changes on the outside, not on the inside.

人的外表会变，但他的内心不会。

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A person changes, derived from the self-motivated, rather than waiting for what a godsend.

一个人的改变，源自于自我的积极进取，而不是等待什么天赐良机。

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Ideas about social class—whether a person is "working-class" or "middle-class"—are one area in which changes have been extremely slow.

关于社会阶级的观念，判断一个人是“工人阶级”还是“中产阶级”，这是一个极其缓慢的变化过程。

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When left untreated,however, it can lead to changes in a person's physical appearance and even death.

VOA: special.2010.07.06

DNA methylation shows chemical changes in a person's deoxyribonucleic acid,or DNA.

VOA: special.2009.11.24

That means, just like a man with prostate cancer may not have any symptoms, a person's brain may have undergone changes that lead to Alzheimer's without visibly affecting a person's day-to-day life.

CNN: Less-stressed people may have lower dementia risk

Changes in a person's condition would be included in an email sent to the person's family or doctor.

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It can also help a person notice environmental cues or changes that a sober brain would block out, Dr. Wiley says.

WSJ: Tactics to Spark Creativity