全部

1·No one knows what made the Germanic language branch off from the Indo-European family.

无人知晓什么原因导致了日耳曼语从印欧语系中脱离。

2·English is a language branch belonging to the West Germanic line of the Indo-European family.

英语是西日耳曼语系的一个分支。西日耳曼语系属于印欧语族。

3·English belongs to the west Germanic branch of the Germanic sub-family, which in turn is a member of Indo-European family, the largest one in the world.

英语属于日耳曼语支中的西日耳曼语分支，而日耳曼语本身又属于世界上最大的语系——印欧语系。

4·Dutch, and English like the British, German, Dutch belong to the same Indo-European Germanic West Extension.

荷兰语，和英语很像，英、德、荷兰语同属印欧语系日耳曼语族西支。