41. But he had to work under very adverse conditions . 42. And this is a really fundamental component of how cells work. 43. So there is a big challenge in getting the schools to work. 44. So you can imagine - and this is what we are working on - 45. Amithabh returned to his work in March 2006. 46. An eight-hour working day was introduced back in 1921 . 47. This is work done by Quentin Lindsey who's a graduate student. 48. I work on the issue of commercial sexual exploitation. 49. The pattern is arithmetical and works horizontally. 50. It's very important that these tsunami sirens work,
