be to blame

Which driver was to blame for the accident?

哪位司机是这次事故的肇事者？

People who circulate false news are to be blamed.

散布流言者该受遣责。

She retorted upon him, saying he was to blame.

她反驳他, 说他不好。

Loss of habitat is to blame, specifically, the lack of the pocket of air between snow and ground called the “subnivean space.” There lemmings winter and give birth to prodigious litters of young.

生存环境的缩小是一个原因，更主要的是它地面之间被称为“下空间”里得不到保护，有些旅鼠会冬天生下数量惊人却无法存活的小旅鼠。