That is, 30-hour chunks of data (which may span40 hours of clock time due to dropouts) which require a search of a spindown parameter as well as sky position. But nothing is set in stone.
也就是30小时的大段数据（由于含有无效信息可能会扩展到40小时），这与天区位置有关。
2
That's a big chronological span, and it netted a big genetic haul: the research identified no fewer than 440 genes that start to slow down after age 40.
这个部位的时间跨度很大，而且含有大量基因：研究发现，在40岁后，不下440个基因开始放缓速度。
3
A typical life span for Sumatran orangutans is 40 to 50 years.