1) one of the great scientists once remarked …最伟大的科学家之一曾经说过，…
2) “genius is two percent inspiration and ninety-eight percent perspiration” is the opinion held by edison. this remark has been confirmed time and again by more and more people. “天才是百分之二的灵感，百分之九十八的汗水”是爱迪生的观点，而且反复被越来越多的人所证实。
3) many years ago, a great philosopher said that … 许多年以前，一位伟大的哲学家说过…
4) there is an english proverb which says that “easily come easily go”. 有一个英语谚语说“来得容易，去得也容易。”
5) there is an old saying, “practice makes progress.” it is the experience of our forefathers, however, it is correct in many cases even today. 古语道：“熟能生巧”。这是前辈的经验，而在今天许多情况下也适用。
6) as a popular saying goes … 正像一句流行话所说的那样…
7) one of the great write
