（3）50ms 后，sleep 结束，JVM 把虚拟线程重新挂到某个空闲的载体线程上，继续执行后面的 getOrderFromDb()，然后又遇到 sleep，再次卸载……
“When people get hurt around our products, we need to take every ounce of education from it that we can,” Jacob Zeiger, a senior air-safety investigator at Boeing, told me, when I visited the Boeing facility this past December. “These technical findings are sacred.” Within hours of any major incident involving a Boeing plane, Zeiger and his team are notified, and they may spend a week to ten days studying the damage and interviewing the crew, piecing together what went wrong. In 2008, for instance, the engines on a 777 stopped responding, and it crash-landed short of a runway in London, shearing off its landing gear. Afterward, a team of investigators re-created the plane’s fuel system in a Boeing lab. A small heat-exchange unit, they found, had accumulated ice during the flight. Every 777 has since been retrofitted with a new version of the unit. Thanks to decades of such refinements, today’s jets may be the world’s most reliable machines. Flying in them is less likely to kill you than walking on staircases.，推荐阅读51吃瓜获取更多信息
На МКАД загорелись две машины14:46，推荐阅读爱思助手下载最新版本获取更多信息
Editorial standards Show Comments
Cursor (left) for code browsing, edits, and cross-checking plans with other models