重点讲解：
1. be known as 称为；叫做；
例句：This is known as floating-point representation.
这就是所谓的浮点表示法E6Leh9~tCM=^。
2. turn out 原来是；结果发现；
例句：If it does turn out that you have done something wrong, be quick to say "sorry" .
如果结果证明你确实做错了什么，要赶紧说“对不起”[~8spe2sKm。
3. have the last word (讨论、争论、分歧中的)最终决定权；
例句：She does like to have the last word in any discussion.
她确实喜欢商量什么事都最终自己说了算on^j9&yM_.!a9HDK0zwd。
4. be aware of 注意到的；察觉到的；意识到的；
例句：John has been aware of having done something wrong.
约翰已意识到自己做错了事情dkSCzT%1|ZojK。