This is influenced by hurricanes, political instability, strikes, cold weather, economic activity and other factors.
Though there are many contributing factors to why manatees are endangered (boat strikes, cold temperatures, disease, infant mortality), scientists are stumped by what killed the record number in 2013.
Ground temperature and deformation of embankment were monitored at typical sections of the Harbin-Qiqihar high speed railway (HSR) to investigate complex causes of differential embankment deformation due to sunny-shady slopes and route strike in cold regions.
In fact I was afraid that I would be struck with cold in the way people are struck with heat, so I came straight home..
And although influenza typically strikes in colder months, the swine flu virus, A(H1N1), has swept through summer camps in the United States and Canada.
The results contrasted with earlier, less reliable studies that have shown echinacea to be somewhat effective in helping adults stricken with colds to recover, said the report, published in this week's Journal of the American Medical Association.
When I was 10, there was the miners' strike, and the Cold War was going on; it was quite a potent time to get involved in politics.
I don't know, but the upshot is that they often strike you as cold, silent and sterile -- mere architectural models.
That is why he inches ever nearer to Philomena, with her daunting faith in forgiveness and restraint, and also why her last closeups, clawed with age and pinched with cold, strike us as Shakespearean: like patience on a monument, smiling at grief.
