过去五个月中，只有一份工作有着落。Over the last five months, only one job [ materialized].这些粒子就这样从一个细胞表面跳向另一个细胞，直到它们着落在一个未受感染的细胞上。The particles thus bounce from one cell surface to another until they [ land] on an uninfected cell.但是实际上（飞机）在接近着落的时候没有出现在雷达上，这是引起我关注的原因。But the fact the plane has not appeared on radar when it neared [ land] gives me cause for concern.
双子座的小蛇
