If you can swim a length in forty seconds, push yourself to swim it in thirty-five.

如果你能在40秒内游完一段距离，那就督促自己在35秒内游完。

" Forty seconds on a six and a half hour flight. Not so bad, " Lenina conceded.

“六小时半的飞行只迟到四十秒。不算坏。”列宁娜承认了。

Tremors which went on for thirty to forty seconds were felt as far as the Indian capital Delhi.

地震持续了 30 到 40 秒，远在印度首都德里都能感觉到。

Elfride's eyes were not closed for more than forty seconds.

埃尔弗里德的眼睛有四十多秒没有合上。

However, totality will only last at a MAXIMUM for two minutes and forty seconds, so it is important to prepare to observe the eclipse in other ways.

然而日全食最多只有两分40秒，所以还是要准备其他方式。

It was in 1862 that, in spite of the Southern Members of Congress, who wished a more southerly route, it was decided to lay the road between the forty–first and forty–second parallels.

1862年，尽管有南方的议员反对，结果还是选定了在北纬四十一度和四十二度之间的地区修了这条铁路，而南方议员则要求铁路建筑得更靠南部一些。

" Forty seconds," said my uncle. " Forty seconds between the two words; so the sound takes twenty seconds in coming. Now, at the rate of 1,120 feet in a second, this is 22,400 feet, or four miles and a quarter, nearly."

“四十秒，” 叔叔说。“两个词之间有 40 秒的间隔；因此声音需要 20 秒才能发出。现在，以每秒 1,120 英尺的速度计算，这就是 22,400 英尺， 或者说接近四又四分之一英里。”