It was this thought that caused John Martin, once head of the Moss Landing Marine Laboratories in California, to declare, "give me half a tanker of iron, and I'll give you an ice age."

这个想法导致赵恩•马汀断言，“给我半油轮的铁，我将给你一个冰河时代。”赵恩•马汀曾是位于加利福尼亚的苔陆海洋实验室的领导。

At most airports, traffic controllers organise the approach and landing order of incoming planes in their last half-hour or so of flight.

在许多飞机场，交通管理人员在飞机行程的最后半小时里下达可以靠近或降落的各项指令。

By midmorning, nearly half of the Americans were wounded, but the militants directed their gunfire on the arriving medevac helicopters, preventing them from landing.

到早晨时，近一半的美国人都受伤了。而武装分子们将炮火对准了即将赶来的救援直升机，防止他们着陆。

But first it faces a long, 354-million-mile (570-million-kilometer) journey to get there, taking about eight and a half months before landing in August 2012.

当然，首先它得面对一个漫长的570多万公里的旅程，大约要到明年八月份，就是八个半月才能到达火星。

The plane will be landing in half an hour and the washrooms will be closed soon. You'd better use it now if you need to.

还有半个小时飞机就要降落了，洗手间马上就要关闭了。如果你要去厕所最好现在就去。