Men and birds are fain of climbing high.

不论人还是鸟都愿意往高处攀。

I am weary and would fain get a little rest.

我，很乐意休息一小会儿。

The soldiers were fain to eat horseflesh.

士兵们只好吃马肉。

I would fain go with you.

我高兴和一起去。