全文摘自最新一期 “经济学家”杂志 Economist, Seven minutes of terror 惊心动魄7分钟! THREE rovers have landed successfully on Mars, Sojourner, Spirit and Opportunity. All three American craft landed in the same way. A heat shield protected them from the fiery rigours of the initial entry into the Martian atmosphere. Then a parachute slowed them do… (阅读全文)