each指两者或两者以上每个；both指两者都，如：

As the two books are useful and each has its own strength, I'll take both.

由于这两本书都很有用，而且每本书都有各自的优点，所以我两本都要。

either表示两者中的任何一个；neither表示两者都不，如：

Either of the two books is very important to me.

其中任何一本书对我来说都很重要。

Although neither seems easy, I’ll never give up.

虽然两本书都不容易，但我永远不会放弃。

all指三者或三者以上全部；none表示三者或三者以上全不；nothing表示没有任何东西，如：

All of my books are well chosen, and none of them lets me down.

我所有的书都是精心挑选的，没有一本让我失望。

Nothing will stop my love for books.

没有什么能阻挡我对书的热爱。

another指三者或三者以上中的另一个；others指若干部分中的另外一些，如：

There are already many difficulties in life and I don’t mind another. Unlike others, I never choose one book because it’s easy.

生活中已经有很多困难，我不介意再遇到另外一个。与其他人不同，我从不因为一本书很容易而选择它。

other指另外的，是形容词，the other指两者之中的另一个，the others指两部分中的另外一些，如：

Other people may hate difficulties, but I’ll overcome all of them. Some people dislike books because of difficulties in reading, while the others love them because they have already overcome all of the difficulties. I have two favorite books. One is difficult. The otheris not easy either.

其他人可能讨厌困难，但我会克服所有困难。有些人不喜欢书是因为阅读困难，而另一些人喜欢书是因为他们已经克服了所有的困难。我有两本最喜欢的书。一本很难。另一本也不容易。

Two Books

As the two books are useful and each has its own strength, I'll take both and either of them is very important to me. Although neither seems easy, I’ll never give up. All of my books are well chosen, and none of them lets me down. Nothing will stop my love for books. There are already many difficulties in life and I don’t mind another. Unlike others, I never choose one book because it’s easy. Other people may hate difficulties, but I’ll overcome all of them. Some people dislike books because of difficulties in reading, while the others love them because they have already overcome all of the difficulties. I have two favorite books. One is difficult. The other is not easy either.

由于这两本书都很有用，而且每本书都有各自的优点，所以我两本都要，其中任何一本对我来说都很重要。虽然两本书都不容易，但我永远不会放弃。我所有的书都是精心挑选的，没有一本让我失望。没有什么能阻挡我对书的热爱。生活中已经有很多困难，我不介意再遇到另外一个。与其他人不同，我从不因为一本书很容易而选择它。其他人可能讨厌困难，但我会克服所有困难。有些人不喜欢书是因为阅读困难，而另一些人喜欢书是因为他们已经克服了所有的困难。我有两本最喜欢的书。一本很难。另一本也不容易。

花瓶中的睡莲和桌上的书本