Even if stressful events are dangerous, many—like the death of a loved one—are impossible to avoid.
即使有压力的事很危险,比如所爱之人的死亡,但这些事很多是无法避免的。
While they could once buy second-hand textbooks, or share copies with friends, the digital systems are essentially impossible to avoid.
虽然曾经他们可以购买二手课本,或者和朋友共享复印本,但数字系统根本无法避免。
"That it is practically impossible to avoid coming into contact with them," says Frederick vom Saal, a biologist at the University of Missouri.
“避免与它们接触是基本不可能的。”密苏里大学的生物学家 Frederick vom Saal 说。
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