43. 因此，我们能下个结论，那就是…。
We can, therefore, come to the conclusion (that)子句
例︰因此，我们能下个结论，那就是世上自由罪珍贵。
We can, therefore, come to the conclusion that nothing is so precious as freedom in theworld.
44. 如果我们能做到如上所述，毫无疑问地…。
If we can do as mentioned above, there can be no doubt (that)子句
例︰如果我们能做到如上所述，毫无疑问地我们就能精通英语。
If we can do as mentioned above, there can be no doubt that we can master English
45. 因此，这就是…的原因。
Thus, this is the reason why ….
例︰因此这就是我重感冒的原因。
Thus, this is the reason why I caught a bad cold.
