他们非常令人震惊。用英语怎么说？

他们非常令人震惊。

They were truly appalling.

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

truly

adv. 真正，精确地，正确地，忠实的，诚实地，正当地；

例句
The whole cast executed the production with truly professional aplomb.
全体演职人员以一种真正的专业精神，从容不迫地开始了影片的制作。

appalling

adj. 骇人听闻的，令人震惊的，可怕的；

例句
They have been living under the most appalling conditions for two months.
他们已经在恶劣不堪的条件下生活两个月了。