the first half of the twentieth century
20 th century first half
二十世紀上半葉，通常認為“犯錯壹代”的政治家對於內戰負有***同的責任，他們對自己造成的危機失去控制。
In the first half of the twentieth century, it was common to blame a “blundering generation” of politicians for losing control of a crisis that was largely of their own making.